Stripping the HK G11

Our thanks to the collection that holds the G11 for the privileged and nerve-wracking opportunity to field strip it and take a look inside. If you’d like to know more about the history of the G11’s development you can check out our video and full blog on it here. Vic has done a great series of videos looking at the G11 and the other prototype rifles from the US Army’s abortive Advanced Combat Rifle trials – you can find those here.


In this blog we’ll take a closer look at some of the G11’s components, for a demonstration of dissassembly and and explanation of how the rifle works in principal check out the video above.

Firstly, lets take a look at the exterior of the rifle. The weapon has a box-like polymer coated outer shell. The shell is made up of three parts, with the butt assembly and forend locking into the centre assembly which includes the pistol grip, trigger mechanism and optical sight. The forend and butt are locked into the centre assembly by plastic locking tabs. While stiff and somewhat difficult to depress the tabs are reportedly prone to breaking.

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Left side view of the G11 (Matthew Moss)

Before we look at the G11’s internals lets take a look at the shell components. Here we can see the inside of the forend, we can see a metal (aluminium I believe) barrel tube into which the barrel slides.

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Close up of the the inside of the G11’s forend (Matthew Moss)

Below is a photograph of the rear of the centre assembly looking forward, the small white circle (sadly slightly out of focus) is the bushing the barrel protrudes through into the forend.

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The G11’s centre assembly houses a metal guide rail and magazine guide as well as the trigger mechanism (Matthew Moss)

Next we have a view of the inside of the rifle’s butt assembly. Note the scuff marks on the inside where the centre assembly has scrapped the plastic. We can also see the locking tab windows which are on the top and bottom of the butt.

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A view inside the G11’s butt stock (Matthew Moss)

Inside the butt we can see the ‘toothed wheel’ and ‘sealing gear’ which are turned when the cocking piece is rotated. These plastic pieces act directly on the action. Behind that is the gas escape valve, which will tap off excess gas if over pressure problems occur with the rifle.

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A close up of the sealing gear and toothed wheel that interface with the cocking handle (Matthew Moss)

The first step to disassembling the G11 is ensuring the weapon is clear by pushing the cleaning brush up into the breech.

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Close up of the G11’s cleaning brush, housed inside the pistol grip (Matthew Moss)

Lets now take a look at the rifle’s action up close, below we can see the G11 with its forend and butt assembly removed. Next to it is the breech cylinder and control disk.

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The G11 field stripped (Matthew Moss)

Here are some photos of the action from various angles:

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A view of the action from the rear. We can see the striker assembly, clamping plate, ejector lever and cylinder retaining catch (Matthew Moss)
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From the right side of the gun we can see the two gears which work the breech cylinder – the spur gear and the actuating gear (Matthew Moss)
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On the underside of the action we can see the rear of the clamping plate, the slide – which is slightly worn, and the sear projecting below it (Matthew Moss)

Here’s some close ups of the breech cylinder and control disk:

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The top of the control disk, which has to be removed before the breech cylinder can be (Matthew Moss)
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Underside of the control disk (Matthew Moss)
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Top view of the breech cylinder (Matthew Moss)
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A view of the square chamber which is a replaceable part which is held in the breech cylinder by a circular retaining spring – seen on the right (Matthew Moss)
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The base of the breech cylinder with notches where the actuating gear interfaces (Matthew Moss)

Here are some close ups of the various parts of the action:

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A close up of the rifle’s spur gear – which gives the G11 its almost clockwork appearance (Matthew Moss)
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Another close up of the underside of the action (Matthew Moss)
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Close up of the end of the barrel, with the square outline of the breech chamber visible – the G11’s caseless ammunition was rectangular but the projectile was round in diameter (Matthew Moss)
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Another shot of the rear of the action showing the striker / firing pin assembly and spring  (Matthew Moss)

According to the 1989 armourer’s manual, provided for the ACR trials, the G11 is made up of a total of nearly 450 individual parts. 144 of those make up the G11’s breech assembly.

With the breech and barrel assembly removed from the centre assembly here’s a diagram I put together showing most of the component parts of the G11’s action:

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G11 Breech & Barrel Assembly Diagram (Matthew Moss)

Next lets take a look at the G11’s barrel assembly with its recoil management system and gas piston:

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A bird’s eye view of the G11’s breech and barrel assembly, note the barrel markings (Matthew Moss)
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A side view of the breech with the cylinder and control disk in position (Matthew Moss)
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A view of the housing of the recoil mitigation system, on the other side is the gas piston system (Matthew Moss)

Finally, here’s a photo of the G11 broken down into its major component assemblies: magazine, forend, centre assembly breech & barrel assembly and butt stock:

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G11 field stripped (Matthew Moss)

If you enjoyed the video and this article please consider supporting our work here.


Bibliography

HK G11- ACR. Armourer’s Manual for Maintenance of Repair of Rifle, 4.92mm, ACR, March 1989 (source)

‘Rifle, 4.92mm, ACR’ Operator’s Manual (source)


Please do not reproduce photographs taken by Matthew Moss without permission or credit. ©The Armourer’s Bench, 2018.

Update & Patreon

We put the video above together to hit our main points but please read on for more information.

Hi guys,

A few weeks ago we mentioned the TAB Patreon page for the first time at the end of a video, so we thought it was time we explain why we’ve launched it and our hopes for it. When we launched TAB just over a year ago, we set up a Patreon page for future use but we decided we would wait to launch it. As I said at the time we felt we wanted to show you what we wanted to accomplish and show you we were worth your time and money to support. But a few people spotted the links and signed up as patrons – to those early Patreon supporters – thank you!

We’re still a small channel but we recently passed a few important milestones. We now have approaching 40 videos live, an amazing 2,500 subscribers and we recently passed 100,000 total views! With that we hope we have shown that we are serious about producing detailed, thoroughly researched, well made videos and articles. We appreciate everyone that watches, likes and comments – it makes the work that goes into the project worth while. So we thought it was time to mention the Patreon page publicly.

It’s important to note that Vic and I are not in this for the money. We love history, we love firearms and we love researching and telling the story of incredible designs like the Ferguson Rifle, the HK G11, the AR-10 and the Curtis bullpup to name just a few. When we set up TAB we made the conscious choice not to monetise the channel through YouTube, which at the time had deleted and suspended several gun channels. We felt that the best thing to do was to avoid YouTube’s algorithms and stay under the radar, at least until we were established. Little seems to have changed since then, friends’ channels like Bloke on the Range and BritishMuzzleLoaders have since had strikes, demonetisations and even deletions! TAB is still ‘demonetised’ and probably will continue to be for the foreseeable future. We would prefer to be viewer supported by our community of viewers.

So if you would like to help towards the upkeep of the TAB website, help us buy equipment and research materials or help us travel to collections then we are sincerely grateful and we appreciate every dollar, pound, euro and penny that is donated to us!

What do we share on Patreon?

Over on the Patreon page we currently have two tiers of supporter, you can find out more about those here. At the moment we share behind the scenes photos and content showing you sneak peaks at upcoming videos and how they’re produced. The Patreon Lens feature (basically Patreon’s version of Instagram Stories or Snapchat) is great as it lets us share quick clips and photos easily. We’ll often post several of those a day when working on episodes, often showing you how we research, film and edit.

We also post blogs about upcoming research trips, the arrival of new research materials/books and share photos of guns sometimes weeks or months before the episode covering them is finished and ready to be posted. In the future we hope to do Q&A videos/streams and have some tangible perks (a TAB t shirt might be cool?) too. This is something we will be working on in the new year.

If you are one of the handful of people who have supported us through Patreon over the last few months, once again thank you. If you have just heard about it or have just found the page and this post then I hope you’ll consider putting in $1 a month to support our work, we have grand plans and many more interesting historic small arms stories to share – we really appreciate it, thanks for reading!

You can find out more over on the TAB Patreon page here

Thank you – Matt & Vic

Springfield M1903 with a Maxim Silencer

The first viable firearm suppressors appeared just after the turn of the 20th century with a series of patents being granted on various designs between 1909 and 1920. In 1895 Hiram Percy Maxim, son of Sir Hiram S. Maxim – inventor of the machine gun, established his own engineering company. Initially this company focused on the burgeoning automobile market. But in 1906, Maxim began developing a series of designs to moderate sound. Initially, he experimented with valves, vents and bypass devices, however, he eventually finalised his basic idea based on baffles and developed a series of practical suppressors; which were sold through the Maxim Silent Firearms Company (later renamed the Maxim Silencer Company.) He filed his first patent on 26th June, 1908, which was granted in March the following year (US 916,885).

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H.P. Maxim’s first silencer patent, granted in March 1909 (source)

During the 1910s Maxim sold a successful range of silencers, as they were then largely known, on the commercial market. I have written more about these here. Today’s focus is on Maxim’s attempt to capture the military market for silencers. As early as 1907 Maxim was looking at ways to suppress the Army’s new Springfield M1903. In June 1908, he drew up a design for a rifle with a shortened barrel with a silencer added, connecting with the forend.

Silencers Pique the Army’s Interest

M1903 Springfield with a Maxim Silencer
M1903 Springfield fitted with a Maxim Model 1910 Silencer (Cody Firearms Museum)

The US military first took interest in silencers in 1908. The 1909 annual report of the Chief of Ordnance notes that:

 “The reports of tests so far received recommend that the silencer be not adopted for use in the service in its present form. On damp, cloudy days the slow escape of gas from the silencer might assist an enemy in locating the position of a firing line; it is also difficult to handle the silencer when it becomes heated, and additional manipulation is required when it becomes necessary to fix the bayonet.”

The following year the Annual Report from Chief of Ordnance describes the Model 1910 silencer, which overcame “most of the defects found in the original”, the report then describes the Model 1910’s mounting method:

“The rear of the silencer is extended to fit over the end of the barrel and takes the place of the front sight fixed stud. The silencer is prevented from turning by means of a spline on the barre, and is held from moving longitudinally by means of a pin. The front sight movable stud is mounted on the silencer.

Intriguingly, the report confirms that “five hundred of the silencers are now being procured with a view to the issue of one or more to each organisation for instruction of recruits in target practice, and for issue to the militia, on requisition.”

In 1910, Springfield Armory tested Maxim silencers fitted to both a M1903 and an older .45-70 trapdoor Springfield. Colonel S.E. Blunt, the Armory’s commanding officer, reported in January 1909 that the Maxim silencer reduced report at the muzzle and felt recoil by around a third with no loss of accuracy. The initial tests put 400 rounds through one silencer before it failed, noting that the silencer could “withstand any rapid fire to which they could be exposed in service under ordinary conditions.”

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An M1903 with a Maxim 1910 Silencer being test fired, left to right: H.P. Maxim, Lt.Col. R. Goodman, & Capt. E. Church (from the National Guard Magazine)

The US School of Musketry also tested the Maxim silencer. Twenty four soldiers were issued silenced M1903s for the test. The School of Musketry’s testing found that the report at the muzzle and the recoil felt by the rifleman was reduced when compared to a normal, unsuppressed, M1903. The School of Musketry’s report noted that:

“It greatly facilitated instruction of recruits in rifle firing. It materially lessened the fatigue of the soldier in prolonged firing, such as would occur in modern battle, which is a distinct military advantage.
The muffling of the sound of discharge and the great reduction in the total volume of sound which permits the voice to be heard at the firing point about the sound of a number of rifles in action, greatly facilitate the control of the firing line.”

They also reported that “the silencer annuls the flash” a quality that they felt was a “positive military advantage in view of the extent to which night operations may be employed in future wars.”

They also felt that the silencers would help “conceal positions of sentinels and to deceive the enemy as to the position of the firing line” especially at night. As the silencer was used with standard ammunition it could do nothing to reduce the crack the round made as it travelled down range, without subsonic ammunition the silencers were only able to moderate the report of the rifle firing.

Maxim did his best to develop a robust silencer that would meet the military’s needs. He incorporated a mounting point for a bayonet on the military variant of the Model 1910. The model 1910 silencer for the Springfield M1903, however, required the removal of the rifle’s front sight. This attachment method was felt to be the Model 1910’s weakest point and something Maxim himself actively looked to address.

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Maxim Model 1910 Silencer (Matthew Moss)

The Maxim Silencer Company subsequently developed the Model 1912 and subsequently the further improved Model 15, which Maxim christened the ‘Government Silencer’. Encouraged by this early military interest Maxim envisioned a military silencer being useful in roles such as sniping, guard harassment and marksmanship training. He believed that the increasing number of American men joining the military from cities who lacked experience in shooting were struggling to master the .30-06 M1903 because of its loud report and stout recoil. Maxim felt that using a silencer would prevent recruits being intimidated by their rifle and help them to learn the fundamentals of marksmanship faster. This was an issue that was subsequently resolved by the use of .22 calibre training rifles.

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US Ordnance Corps inventory photo showing the Moore (top) and Maxim (bottom) trials silencers together (source)

Maxim was not the only designer working in the field and Robert A. Moore, his most competent competitor, also submitted a design for military testing. The Moore Silencer Company secured a number of patents protecting designs for both civilian and military rifles (US 956,717 & US 1,021,742). Moore’s designs used large gas expansion chambers which sat beneath the rifle’s muzzle as well as a series of vortex chambers ahead of the muzzle. The muzzle gases were supposed to be deflected by concave surfaces down into the silencer which had a number of partitioned chambers. The sides of Moore’s first silencer were ported with vents to allow cool air to rush into the casing theoretically cooling the gases, but this was abandoned by his second 1911 design (seen below).

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R.A. Moore’s March 1912 improved silencer patent (source)

US Ordnance tests with Moore silencers began in 1910. When the two silencers were compared the US Army found that there was little difference between the two rival designs with regards to the reduction of sound, recoil and flash. Colonel S.E. Blunt later reported:

“the opinion that there is but little difference between the Moore and Maxim silencers as regards, reduction of sound, recoil and flash; that the method of attachment of the Moore silencer to the service rifle is superior to the attachment provided with the Maxim silencer, model 15; that while the Moore silencer gives higher velocity and does not deflect shot group as much as the Maxim silencer; yet the endurance of the Moore silencer indicate that it has not yet been sufficiently perfected to withstand rapid fire and is therefore inferior to the Maxim silencer.”

The Springfield Armory’s report in July 1912, found that the Moore silencer was more accurate and had a better attachment system. The Maxim silencer, however, was more durable and could withstand more prolonged rapid fire. Moore’s silencer attached by latches behind the front sight post and at the bayonet lug and required no tools to fit. It could mount a standard M1905 bayonet while Maxim’s design required a specially adapted proprietary bayonet. While the Maxim required some minor modifications to the front sight to enable it to be mounted to the M1903. The US Army subsequently purchasing 100 Moore silencers for a full trial (this was confirmed by the 1911/12 Annual Report of the Chief of Ordnance) – these were still in inventory in 1918, but no evidence of their use in service has been found.

With field trials planned, there appears to have been discussion of equipping two rifles per company with silencers for use by sharpshooters in conjunction with two star-gauge (accurate barrelled) rifles and the M1908 or M1913 Musket Sights. This was not the large-scale contract that Maxim had hoped for believing silencers might become standard issue, however, the funding was not available and the idea behind the silencer’s use was not fully embraced by the military.

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H.P. Maxim’s 1913 patent for an improved coupling method (US Patent Office)

Between 1912 and 1915 Maxim improved his silencer offering the military Model 14 and Model 15. The US Army appears to have only purchased the Model 15 for testing, although secondary sources suggest the purchase and testing of some Model 1912 silencer. In his February 1913 patent (US 1,054,434), filed in April 1910, protecting his new attachment system Maxim explains how it worked:

“The improved coupling comprises a sleeve adapted to fit upon the barrel, a split grip-v sping ring to encircle the barrel and a nut or internally threaded sleeve adapted to engage the threaded portion of the coupling sleeve and at the same time to clamp the gripping ring tightly about the barrel.”

This patent appears to protect the later Model 15 or ‘Government Model’ silencer’s attachment method which required no removal of parts from the rifle. While the Model 14 could mount a standard M1905 sword bayonet with no modification to the bayonet the Model 15 did not have an attachment point for a bayonet.

In August 1915, the commanding officer of Rock Island Arsenal requested permission to transfer “20 rifles fitted with maxim silencers, 20 bayonets for same turned in from field” to Springfield Armory. This tantalising primary document fragment confirms that further testing occurred during 1915.

In terms of primary source information about testing and deployment of silencers by the Army before the First World War there isn’t a great deal available. Secondary sources, including William Brophy and David Truby, note that the US military’s first deployment of silencers came in 1916, when General John Pershing’s Mexican expedition against Pancho Villa included a squad of snipers apparently armed with silenced M1903s, however, little is known about their use in the field.

Presidential Concerns

In addition to the military’s continued testing, the Maxim silencers had gained some public notoriety and President Woodrow Wilson was familiar enough with them to raise concerns about public ownership of the devices on the eve of America’s entry into the war. On the 30th March 1917, just three days before the US entered the war, President Wilson had his personal secretary, Joseph Tumulty, write to the Department of Justice requesting that they look into the threat German Fifth Columnists might pose if they used Maxim Silencers to attack key infrastructure. His letter stated that the sale of Maxim Silencers “should be prohibited and all outstanding weapons collected by the police.” The President was concerned that sentries guarding isolated posts such as bridges and munitions factories might become targets of opportunity for assassins with silenced weapons. His memorandum said “great damage could be done before main guard… discovered sentry’s death.” On the 3rd of April, the Department of Justice in turn wrote to the Secretary of War and asked for his comment on the issue.

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President Wilson addressing Congress, asking for a declaration of war on Imperial Germany (Library of Congress)

Brigadier General William Crozier, Chief of US Army Ordnance, was consulted by the Adjutant General. Crozier responded on the 7th April, saying that the use of a Maxim Silencer by ‘unauthorised persons’ was not considered sufficiently important to require special action by the War Department. He continued saying it should be noted that: “a silencer reduces the intensity of the report at discharge, but does not entirely eliminate it.” Despite the War Department’s lack of concern about silencers the Maxim silencer has the distinction of being mentioned in the US declaration of war on Germany. Presidential Proclamation #1364, published on 6th April, 1917, stated:

“An alien enemy shall not have in his possession, at any time or place, any firearm, weapon or implement of war, or component part thereof, ammunition, maxim or other silence, bomb or explosive material used in the manufacture of explosives.”

I’ve been unable to find any mention of silencers being used by ‘alien enemies’. Maxim’s military silencers, however, reportedly shipped around the world with orders from Mexico, South America, China, Japan, Britain, France, Belgium, Russia and Germany. One pre-war Maxim advert boasted that the design had been approved by the German military. During the First World War both the British and Germans reportedly deployed snipers equipped with Maxim silencers in small numbers. In February 1916, the Greek government wrote to the US War Department enquiring about obtaining the Army’s test results for what they called ‘Maxime Silencers’. The Ordnance Office provided the requested report in March but it is unknown if it was forwarded on.

Did the US Army Use the Maxim Silencer During WWI?

The extent of the use of silencers by the US Army during World War One is unknown but recently uncovered Ordnance Office documents show that silencers did reach France but the desire for them was mixed.

Both William Tantum and Clark Campbell suggest that an order for 9,100 silencers was placed. This is said to have been part of a plan to deploy silencers with rifles with accurate star-gauged barrels fitted with M1913 Warner & Swasey Musket Sights for sniper use. Alex MacKenzie, Curator of the Springfield Armory National Historic Site, notes that reports from the Armory show that 1,041 “U.S. Rifles, Cal. .30, Model of 1903, Fitted for Tel. Musket Sight” were assembled but with no mention of the rifles being mounted with a Model 1910 or a Model 15 silencer. He also notes that Springfield Armory produced 3,100 “Knife Bayonets, Model of 1905, for Use with Maxim Silencer” during the fiscal year of 1918. The production of these bayonets would suggest the use of the Model 1910, as the Model 15 could not fix a bayonet.

The documents recently found by researcher Andrew Stolinski, of Archival Research Group, suggest that Maxim silencers did indeed reach American Expeditionary Force (AEF) stores in France.

In June 1918, the Chief Inspector Machine Guns and Small Arms at the GHQ of the AEF suggested the supplying of “Maxim silencers for use with Springfield rifles”, this suggestion, however was rejected by General Pershing himself, replying that “Maxim Silencers not desired in Europe. Recommend that they be left out of equipment tables.” It seems that the Chief Inspector of Machine Guns and Small Arms may have made the suggestion at the behest of Major T.J. Hayes, Division Ordnance Officer for the US 5th Division, who wrote to the Chief Inspector again on August 17th to make the case for silencer use saying:

“I wish to make the recommendation that 15 of these be issued to each infantry regiment, to be used by the Scout platoons of each battalion. Their use would tend to increase the efficency [sic] of these Scout platoons and allow them to perform their work with less chance of detection… I urgently recommend that they be issued and given a thorough trial. I am convinced that some sort of flash arrester [sic] or Silencer is needed for dangerous night patrolling. The Shotguns [likely Winchester Model 1897s] have given most excellent results but the silencers should be provided in addition.”

On the 27th August, Lt.Colonel H.K. Hathaway, an Ordnance officer with the supply division, circulated a memorandum stating that Maxim silencers “are no longer an article of issue” but that “there are in stock at Intermediate Ordnance Depot No 2[in Gievres], 200 of these Silencers and from 100 to 150 Springfield Rifles fitted with these silencers.” While at “Advance Ordnance Depot No 1 [in Is-Sur-Tille], there are 20 Springfield rifles so fitted.” This confirms that silencers both individually (likely Model 15s) and mounted to rifles (probably earlier Model 1910s) were sent to France for use by the AEF. It seems, however, that very few of them left the Ordnance stores.

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Maxim Model 1910 Silencer, note the bayonet mounting dovetail (Matthew Moss)

On the 30th August, a Major Herbert O’Leary, of the Ordnance Department, wrote to the Supply Division on behalf of the AEF’s Chief Ordnance Officer, to inform that “if Maxim Silencers are fitted to rifles, it precludes the use of bayonets as an essential weapon for raid purposes. It is the opinion of this Division that Silencers should not be issued.”

On the 7th September the matter appears to have been settled by a letter from Brigadier C.B. Wheeler, the Chief Ordnance Officer, to the Chief Inspector Machine Guns and Small Arms in response to his suggestion in June. Wheeler quotes General Pershing’s earlier rejection and states that “it is not considered desirable to issue them”. From these documents it appears to suggest that the silencers saw little to no use in France with the AEF, despite the enthusiasm for them among some more junior Ordnance officers like Major Hayes.

The 1918 Ordnance Storage Catalogue, Vol. V, listed the ‘SILENCERS, Maxim, M1910 for U.S. rifles, M1903’, ‘SILENCERS, Maxim, Model 15 for U.S. rifles, M1903’, and the ‘SILENCERS, Moore, for U.S. rifles, M1903’. Although no numbers are given.

After the war the silencer’s remained in US Army inventory well into the 1920s. In March 1922, Rock Island Arsenal requested spare parts to repair some Model 1915 silencers from the Chief of Ordnance’s office only to be told that “there are no repair parts for the Maxim silencers available. It is not believed necessary to repair the Maxim Silencer as they are more or less obsolescent.”

Campbell states that after the war some of the rifles fitted with Model 1910 silencers were offered for sale through the Civilian Marksmanship programme in 1920. Archival research has found later enquiries from the head of the programme requesting silencers to mount on Krag rifles. In May 1923, the Director of Civilian Marksmanship wrote to the Rock Island Arsenal enquiring if the Model 1915 silencer would fit the M1892 Krag and if they were available for sale. Rock Island Arsenal’s commanding officer Colonel D.M. King replied advising that only a small number were available. As a result the Ordnance Office refused to sell a substantial number of the Model 1915’s for fear of depleting “the small stock” still remaining.

In his 2016 Small Arms Review article on the Maxim silencers Frank Iannamico suggests that a small number were given to National Guard units for training purposes. A 1916 Maxim sales brochure mentions that it was sold “to individual members of the National Guard” but makes no mention of larger sales. Hiram P. Maxim himself also appeared on the front cover of the February 1910 edition of the National Guard Magazine, demonstrating his device fitted to a M1903 (see photo above).

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H.P. Maxim’s 1918 patent for a ‘building silencer’ (US Patent Office)

On March 23rd 1925, the rifles mounted with silencers listed as ‘Maxim Silencer & U.S. Rifles Cal .30 fitted for same’ were declared obsolete. While the First World War offered a brief boom in sales of silencers this did not last and Maxim’s company continued to diversify after the war. The Maxim Silencer Company manufactured not only firearm silencers but also sound moderating devices for everything from automobiles to naval engines; from plant machinery to building silencers which were fitted to heating and air conditioning systems. Similarly Moore, like Maxim, also later developed silencers for automobiles filling a patent for an Exhaust Muffler in 1930.

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Left side of the Maxim Model 1910 Silencer (Matthew Moss)

A Closer Look at the Maxim Silencer

The Model 1910 silencer is 7.3 inches (18.5cm) long which when fitted gave the M1903 an overall length of 50.5 inches (128cm). Despite the attachment of the silencer this was still around an inch shorter than the French Lebel Mle 1886.

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Right side of a Model 1910, not the dovetail for the front sight post fitting into the coupling device (Matthew Moss)

To fit the Model 1910 silencer to the rifle a coupling piece was used. First the front sight was removed, then the coupling piece slipped onto the barrel and was secured against rotation by the barrel’s front sight spline (a rib on the top of the barrel which the front sight sat upon). A pin was then passed through the standard front sight stud hole to secure the silencer to the muzzle. The front sight, which had a dovetailed base, was then fitted to the top of the coupling piece.

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The Model 1910 Silencer’s adapted proprietary bayonet with a new male dovetail – less than 10,000 are believed to have been produced (Rock Island Auctions)

The Model 1910 had 18 baffles inside a steel outer casing with a blued finish. Unlike earlier Maxim silencers that had a central channel, down which the bullet travelled, the Model 1910 had a channel off set to the top the silencer, so as not to interfere with sight picture. Maxim’s silencer has a female dovetail on its underside, into which a specially adapted proprietary M1905 bayonet with a male dovetail was fixed. This mounting system rendered about half the bayonet’s length useless as the silencer projected out above it. While not a serious issue, when compared to the Moore’s attachment method, it did hamper the bayonet somewhat.

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The Maxim silencer had a steel outer casing with a blued finish (Matthew Moss)

The Model 1910 silencer was sealed an could not be easily cleaned, the Maxim Silent Firearms Co.’s literature advised running warm water through the silencer and letting it soak overnight before drying it on a hot surface to evaporate the water inside and oil it thoroughly. Not the most practical method of cleaning.
A Maxim Silent Firearms Company brochure dating from 1916 priced the Model 15 at $8.50. Seven years later, in 1923, the Ordnance Office noted that the Model 15 was valued at $5.34.

If you enjoyed the video and this article please consider supporting our work here.


Specifications (taken from 1910 US Army Annual Report)

Weight: 11 ounces or 312g
Length: 5.9 inches or 15cm
Diameter: 1.3 inches or 3.3cm
Baffle Bore Diameter: .341 inches or 8.7mm


Special thanks to both the Cody Firearms Museum at the Buffalo Bill Center of the West for allowing us to examine and film their rifle and to Andrew Stolinski for his archival research into the US Army’s use of the Maxim Silencer. Check out his website, Archival Research Group, here.

Bibliography:

Primary Sources:

Presidential Proclamation #1364, 6th April, 1917, US National Archives, (source)

Various War and Ordnance Department files at The National Archives in Washington, DC (Archive 1) and The National Archives at College Park, Maryland (Archives II) courtesy of Andrew Stolinski at Archival Research Group

War Department, Annual Reports, Report of Chief of Ordnance, 1909, Vol.6 (source)

War Department, Annual Reports, Report of Chief of Ordnance, 1910, Vol.1 (source)

War Department, Annual Reports, Report of Chief of Ordnance, 1913, Vol.1 (source)

Secondary Sources:

M1903 Springfield with Maxim Silencer, Cody Firearms Museum, online catalogue entry (source)

M1903 Springfield with Maxim Silencer, Springfield Armory, online catalogue entry (source)

Moore Silencer, Springfield Armory, online catalogue entry (source)

The Springfield 1903 Rifles: The Illustrated, Documented Story of the Design, Development and Production of All the Models of Appendages and Accessories, W.S. Brophy (1987)

The ’03 Era: When Smokeless Powder Revolutionised US Riflery, C.S. Campbell (1994)

Silencers, Snipers & Assassins: An Overview of Whispering Death, J.D. Truby (1972)

Firearm Silencers, N. Wilson (1983)

Hatcher’s Notebook, J.S. Hatcher (1947)

History of the Maxim Silencer Company, Small Arms Review, F. Iannamico (source)

Heckler & Kock MP5K Briefcase Gun

 

 

Officially designated by Heckler & Koch as the ‘Spezialkoffer’ or Special Case, the Briefcase Gun, sometimes referred to as the Operational Briefcase, is a clandestine weapon system designed for personal protection details. The ‘Special Case’ was introduced in the late 1970s offering the firepower of an MP5K in a concealed package which could be rapidly brought into action.

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A view of the case’s exterior (Matthew Moss)

While the MP5K is already a compact weapon that can be carried concealed under a coat or tucked under the arm, the Special Case, in theory, allowed the weapon to be carried in an instantly accessible way. One H&K leaflet stated that the case retains “approximately the same rapid readiness to fire” as an unconcealed submachine gun. The case had the added advantage of being able to be operated with just one hand.

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A view of the case open with MP5K mounted (Matthew Moss)

To build the brief case Heckler & Koch turned to Hofbauer GbmH, a German manufacturer that specialises in extrusion blow moulded protective cases for tools and equipment, to make the case body. The case is made from black plastic moulded over an aluminium body with a stainless steel locking clasps and a strip of silver trim tape around the lower half. Inside on the right hand rim of the lower half of the case is the case maker’s marking ‘Hofbauer Boss Flanegg’.

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Close up of the case’s Hofbauer markings (Matthew Moss)

Inside the case Heckler & Koch used a modified STANAG claw mount, with a modified release lever, that was normally used to mount optics on G3s and MP5s. The claw mount system holds the weapon in place and a firing mechanism connects a trigger in the briefcase’s handle to the weapon’s trigger inside. The weapon itself is an MP5K, the example we’re examining today has a ‘SEF’ selector and the contoured stahl G3 griffstück (pistol grip assembly). The MP5K was first introduced in 1976, reportedly developed following a request from the security detail of a South American head of state.

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The case’s HK MP5K (Matthew Moss)

The muzzle of the MP5K’s 4.5 inch barrel fits into a tube or shroud in the left side of the case. Below the weapon is a clip to hold a standard plastic MP5 cleaning kit. While inside the lid of the case there is a clip to hold a spare magazine.  The MP5K-PDW, introduced in the early 1990s, will not fit into the case as the muzzle and folding stock prevents it from fitting.

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A close up of the cases muzzle ‘tube’ and rubber muzzle cap (Matthew Moss)

The trigger in the case’s handle works through a series of linkages which connect it with the MP5K’s trigger. Pulling the external trigger upwards pulls an linkage forward which in turn acts on a pivoted arm which pulls the weapon’s trigger. The case has a built in safety on the left side of its handle. When pulled to the rear with the thumb it moves a blocking bar backwards and allows the trigger, inside the handle, to travel upwards to fire the weapon. There is some variation to the trigger mechanisms with a slightly dog-legged, rather than straight, trigger arm being introduced to allow the use of MP5Ks with ambidextrous selectors.

HK briefcase trigger
The cases’s handle disassembled, showing the trigger mechanism (courtesy of Nicholas Chen)

Once fired the spent cases are deflected down into the body of the case and can only be removed once the case is opened to reload or remove the weapon from the case. There is no ejection system built into the case.

In addition to the case we have examined in this video/article, there is also another version based on a leather satchel-style briefcase, known as the ‘Spezialtasche’ or Special Bag. Instead of the moulded plastic case the MP5K is held inside a leather case with a ‘reach-inside opening’, which allows the user to put their hand inside the case and hold the pistol grip and operate the weapon’s controls. The gun is still held in the same kind of cradle claw mount but the leather case does not have the integrated trigger in its handle. The upper half of the case, held in place by four snap buttons, could come free of the lower section to allow the MP5k to quickly be accessed for reloading and removal from the claw mount.

HK Briefcase and Satchel
Late 1970s H&K product sheet for ‘Spezialkoffer’ or Special Case & leather ‘Spezialtasche’ or Special Bag (source)

As you would expect aiming a briefcase is no easy feat, the Special Case was intended for engaging targets at very close ranges or gaining initial fire superiority, suppressing a target long enough to either deploy the MP5K properly from the case or extricate the principal being protected. One of the major issues with the case is naturally limited access to the weapon which makes changing fire more, clearing stoppages and reloading impossible without opening the case – which can only be accomplished by opening the case’s two locking clasps, which in a contact situation would take precious seconds of fumbling.

Here’s what appears to be some vintage promotional footage showing the case in action:

 

A substantial number were sold, especially to Middle Eastern countries. During the 2003 Invasion of Iraq, the troops from the US 7th Infantry discovered a cache of 24 H&K Briefcases untouched, like new in their wrappings, bought by Saddam’s regime. Heckler & Koch continue to offer the case, two models are currently listed on their website: the original briefcase, now referred to as ‘Schießkoffer’ or ‘shooting case’, and a quick deploy ‘Zerfallkoffer’ case (offered for both the MP5K and the MP7) .

If you enjoyed the video and this article please consider supporting our work here.


Specifications (taken from H&K data sheet c.1984):

Case:

Case External Dimensions: 17.24×4.25×12.67in (438x108x322mm)
Weight of case without MP5K: 3.3 lbs (1.5kg)
Weight of case with unloaded MP5K: 7.72lbs (3.5kg)
Weight of case with MP5K + 60 rounds: 14.88 lbs (6.75kg)

Weapon – MP5K:

Length: 12.8in (32.5cm)
Weight (unloaded): 4.4 lbs (2kg)
Barrel Length: 4.5in (11.4cm)
Action: Roller-delayed blowback
Calibre: 9x19mm
Feed: 15 or 30-round magazines
Cyclic Rate: 900 rpm


Bibliography:

Full Circle: A Treatise on Roller Locking, R. Blake Stevens (2006)

The Gray Room, J. Phillips (2010)

‘HK Operational Briefcase: German design, MP5 included’,  Guns.com, C. Eger, (source)

‘H&K MP5K Briefcase: Luggage you can fire’, TFB, R. S., (source)

‘Review: H&K MP5K Briefcase And My Modifications’, TFB, N. Chen, (source)

H&K MP5 brochure c.1985, via Small Arms Review Reference Library (source)

H&K Special Case datasheet c.1979, via Small Arms Review Reference Library (source)

H&K German factory datasheet c. late 1970s for cases, via Small Arms Review Reference Library (source)


Special thanks to the collection that allowed us to examine and film the HK Special Case.

Interview with Richard Fisher of the Vickers Machine Gun Collection

Richard Fisher, the director of the Vickers Machine Gun Collection and Research Association, was kind enough to invite us down to take a look at his collection of Vickers guns. Richard is a fantastic source of information on the Vickers, and British small arms more generally, and I’ve picked his brains on numerous occasions in the past so it was a real pleasure to meet him in person and discuss the collection.

I thought the best way to explain what the collection and research association does is to discuss it on camera with Richard, so as a result we have TAB’s first ever interview. Incidentally, it’s also the first on-camera interview I’ve ever conducted!

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A pair of Vickers Guns dating from 1915 at the Vickers Machine Gun Collection (Matthew Moss)

Richard’s impressive collection spans much of the Vickers’ history with representative examples of not just the many different types of Vickers that were produced but also the accoutrements and equipment that went along with the guns. The collection endeavours to bring together all the weapons, kit and equipment that a British Army section that operated the Vickers would have carried – during both World Wars.

The collection is open to visits from interested individuals and parties and is often shown at history events around the UK. Richard’s website is one of the best sources of information, manuals and documents on the Vickers available and is well worth checking out.

You can find the Vickers MG Collection on twitterfacebook and online at their website: www.vickersmg.org.uk

We’d like to thank Richard for inviting us down and for speaking to us about the collection. In the future we will hopefully have more videos featuring the collection.

 

Dreyse Model 1907

 

This week’s TAB Short episode takes a concise look at the German Schmeisser-designed Dreyse 1907, my thanks to Chuck at GunLab.net for allowing me to take a look at his pistol!


The Dreyse Model 1907 was manufactured by Rheinische Metallwaaren & Maschinenfabrik (RM&M), who later became Rheinmetall. The pistol was designed by Louis Schmeisser and produced by RM&M under the Dreyse brand name.

The Model 1907 was striker-fired, blowback pocket pistol, chambered in .32 ACP / 7.65mm Browning, which fed from a 7-round single stack magazine. Introduced in 1907, but not entering meaningful production until 1908, production ceased in 1918 with approximately 250,000 manufactured.

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Right side of a Dreyse 1907 (Matthew Moss)

Schmeisser filed his patent protecting the design in the US in June 1908, it was granted two years later in April 1910. Earlier German patents were filed in 1906-1907. The pistol was designed to avoid infringing on some of John Browning’s semi-automatic pistol patents. To do this Schmeisser’s pistol had a ¾ length slide which attached to a breech block.

 

 

To cock the weapon, the user grasped the slide at the front and used the slide serrations to pull it to the rear, chambering a round. Spent cases were ejected out of a port on the right side of the pistol. The pistol’s front sight was situated at the front of a scalloped trough in the slide while the rear sight consisted of a raised a notch in the upper receiver.

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Close up of the rear of the 1907, note the rear sight notch, the protruding cocking indicator, the disassembly catch and safety in the ‘safe’ position (Matthew Moss)

When fired the slide and breech block recoiled rearwards, the travel of the slide was stopped by the solid upper receiver housing. There was a frame mounted safety on the left side of the gun, with the safe position pointing to the rear. The 1907 had a heel type magazine release, typical of European pistols of the period.

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View of the 1907’s sights (Matthew Moss)

The pistol’s receiver is hinged and pivots apart for cleaning, clearing and disassembly (see the original patent drawings above). There was some substantial variation, with the 1907’s design evolving during the course of its production life. Early models lacked the scalloped slide that we can see in the pictured model. Internal changes were also made with the addition of a disconnector.

The 1907 was favoured by the German police and gendamarie, with John Walter noting that most of the initial 1,000 pistol production run being purchased by Saxony’s gendamarie and later by the Berlin municipal police.  In 1910, there were abortive attempts to develop a larger 9x19mm version of the pistol. Introduced in 1911, various German state police forces and Prussia’s Border Customs officers strongly interested.

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1911 British patent for the 9mm ‘M1910’ (British Patent Office)

The design, however, was still an unlocked blowback and relied on an extremely strong recoil spring. The spring was so strong that it necessitated a cocking lever which disconnected the spring. This version is often referred to, but not officially marked as, the M1910. The flawed design and production problems at Rheinmetall saw the project abandoned before the outbreak of World War One.

The .32 ACP Dreyse 1907 continued to be manufactured during the war and saw service with elements of the German and Austro-Hungarian armies during, as an auxiliary side arm. The Norwegian reportedly examined the 1907 during their pistol trials (1902-1914) and found it lacking. The Czech military purchased some 1907 pistols but they were quickly removed from service and replaced with the Pistole vz. 24.
In Germany the pistols remained in police service into the 1930s, and some saw auxiliary and late-war Volkssturm service during the Second World War.

My thanks to Chuck Kramer of Gun Lab for letting me take a look at his Dreyse 1907, check out his blog here.

If you enjoyed the video and this article please consider supporting our work here.


Specifications:

Calibre: .32 ACP / 7.65mm Browning
Action: Blowback
Overall length: 16cm (6.3 inches)
Barrel length: 9cm (3.6 inches)
Weight empty: 7.1g (1 lb 9 oz)
Magazine capacity: 7 rounds

(taken from John Walter’s Military Handguns of Two World Wars)


Bibliography:

Military Handguns of Two World Wars, J. Walter, (2003)

1907 Dreyse, UnblinkingEye.com, (source)

Dreyse 9mm, UnblinkingEye.com,  (source)

Patents:

‘Automatic Firearm’, L. Schmeisser, US Patent #956431, 26 Apr. 1910 (source)

‘Improvements in the Breech Operating Mechanism of Automatic Firearms’, L. Schmeisser, UK Patent #13800, 16 Nov. 1911 (source)

Videos:

Small Arms of WWI Primer 020: German Dreyse 1907 Pistol, C&Rsenal, (source)

Please do not reproduce photographs taken by Matthew Moss without permission or credit. ©The Armourer’s Bench 2018

Winchester Experimental Submachine Gun

Held in the collection of the Cody Firearms Museum (CFM), at the Buffalo Bill Centre of the West, is a most intriguing Cold War submachine gun. The weapon came from the collection of the old Winchester Firearms Museum, which the CFM inherited, it is not a test & evaluation weapon made by another company but a submachine gun designed and developed by Winchester. Those who know their Winchester history will know the company had no prior background in submachine gun design, instead being best known for their rifles and shotguns.

left N4 and N2
Left side profile view of the N4 and N2 Winchester submachine gun prototypes with their stocks folded (Matthew Moss)

Very little is known about Winchester’s submachine gun project, but two prototype examples survive, an early ‘in the white’ model labelled ‘N2’ and another which Herbert Houze, the CFM’s former curator, designated ‘N4’ . The documentary evidence for the Winchester submachine guns is sparse, amounting to just entries in the Winchester Museum’s inventory and a faded battered item tag attached to N2. A confusing element is that the inventory simply refers to the two prototypes as N-1 and N-2, with no mention of an N4.
There is also believed to be original engineering drawings housed in the Winchester Archival collection, currently held by the McCracken Research Library, but searches by myself and library staff  have been unable to locate these.

It is unclear if the tag from N2 is contemporary, perhaps added when the gun was handed over to Winchester’s museum, or if it was added later. In under 100 words it give us a short potted history of the N2 itself and the company’s programme to develop a submachine gun.

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Close up of the N2’s item tag detailing the gun & program’s history (Matthew Moss)

Houze suggests the development programme began in 1955 and the tag attached the N2 suggests that development ceased in 1957, whether this is solely for that gun or the entire programme is unclear. This would make Winchester’s weapon a contemporary of the famous Israeli UZI.

The tag describes the N2 as a 9mm blowback ‘NATO Burp Gun’, followed by the name A.A. Arnold, a Winchester engineer perhaps best known for writing a series of manuals for Winchester firearms, followed by ‘dropped Dec ’57’. In his 1994 book, Winchester Repeating Arms Company: Its History & Development from 1865 to 1981, Houze suggests that the weapons were designed by A.A. Arnold and Melvin M. Johnson in 1955, for possible adoption by NATO. The association with NATO might also be the origins of the ‘N’ prefix. I have been unable to find any published patents attributed to Arnold, Johnson or the company relating to the experimental submachine gun.

I contacted NATO’s Archives who advised that they were unable to find any reference or documentation relating to a direct NATO submachine gun requirement. Another possibility is that the weapon was developed to market more broadly to NATO member nations. The submachine gun market at this time in Europe, however, was already saturated by both wartime surplus and a new generation of guns, including the Sterling, the UZI, the Madsen M50, and the Carl Gustav m/45.

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Right side profile view of the N2 ‘in-the-white’ prototype with its stock deployed (Matthew Moss)

The reverse of the N2’s label documents the prototype weapon’s reliability and feeding problems. The tag states that the N2 did “not eject well” and that the bolt slide assembly was too heavy. It also highlights failures to cycle properly with extracted cartridge cases catching under the firing pin. The label then gives a brief description of some of the N2’s features: “fixed firing pin, 33x Mag. Folding stock.” Interestingly, it also notes that the weapon would be cocked by a rod – the hole for which had not yet been added. The tag ends with a suggestion that the heavy one piece bolt assembly should be lightened.

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Close up of the N2’s difficult to decipher tape note (Matthew Moss)

N2 itself also has a piece of masking tape, on the recoil spring assembly cover, with its serial number and calibre written on it, along with A.A. Arnold’s name and some words that are too difficult to make out, but include ‘feed’.

Houze has also suggested that Melvin Johnson, designer of the Johnson rifle and light machine gun who joined Winchester as a designer and adviser in the early 1950s for a short time, and Stefan Janson, designer of the Brtish E.M.2 bullpup and subsequent Winchester engineer, both worked on the project. However, I have been unable to find any documentary evidence of their involvement.

Examining the N2:

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Winchester N4 and disassembled N2 prototype (Matthew Moss)

We can learn a lot from hands on examination of the two Winchester ‘N’ prototypes. Examining N2 we find that the receiver is made up of a piece of shaped sheet metal with a rounded upper half containing the barrel, bolt and cutouts for the grip points on the bolt assembly that allow charging. The bolt assembly rides over the rear portion of the barrel and projects back into the receiver. The lower section of the stamped receiver is rectangular and has a cut out for a separate magazine housing and fire control mechanism consisting of a trigger and push through safety – which we did not remove during disassembly. The N4 is missing its safety.

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Close up of the N2’s magazine housing and trigger guard, note also the trunion freed from the receiver (Matthew Moss)

In the N2, the magazine housing is held in place by the stamped metal trigger guard which rocks into a notch behind the trigger and at the front interfaces with a notch in the magazine housing which has to be placed in the receiver at the same time, both are then held in place by a screw. This was changed in the later ‘N4’ with the trigger guard as a separate independent piece.

Winchester N2 Prototype Reassembly:

The side plates, muzzle end cap and recoil spring assembly cover all made from Aluminium – ostensibly to reduce weight. The submachine gun prototypes both use a pinch cocking method similar to that seen in the earlier British BSA WELGUN developed during WWII. The recoil spring proved to be too strong to cock easily, the addition of ‘rod’ cocking handle is suggested on the N2’s tag. The blued, later N4 prototype, however, is still lacking a conventional cocking handle. The pinch cocking method is not ergonomic, the user’s fingers could easily be caught by reciprocating bolt in charging cut outs in the receiver.

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The N2 prototype disassembled, sadly we were unable to free the bolt from the receiver (Matthew Moss)

Another ergonomic consideration is the Winchester’s submachine gun’s unusually swept back pistol grip angle, the angle of the forward grip made by stock when folded is also similarly angled. Both the weapons have a push though safety selector just above the trigger (likely safe & fully automatic, but could not check as gun unable/difficult to cycle the prototypes easily). The weapon likely fed from a double stack, single feed magazine – either of an similar pattern to the MP40 or proprietary. The N4 seen in Houze’s 1994 book is shown with an MP40 magazine. UZI magazines fit the weapon but don’t lock into place.

The basic design does not change substantially between the prototypes with the control configuration, folding wire stock, pistol grip angle and magazine housing dimensions remaining the same. The N4, however, differs from the earlier prototype in a number of respects. The N4’s nose cap now fits over the rounded half of the receiver, rather than sitting flush and the cut outs in the upper receiver to access the bolt assembly for charging have been moved back slightly.

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Right side view of the N4 blued prototype, note the half cocked bolt and the narrower grip serrations on the bolt assembly. Note also the intersection points of the recoil spring assembly cover and the upper receiver (Matthew Moss)

The later N4 model has pins in place of some of the screws used on the N2. The side plates have been replaced by a one-piece recoil spring assembly cover which projects back further over the magazine housing to the rear of the receiver. The most fundamental difference between the two is that it appears that the front part of the N4’s receiver has been significantly altered with the lower receiver at the front of the gun removed. It appears to have been replaced by the recoil spring assembly cover which appears to slot into the receiver. Sadly, we didn’t have time to disassemble the N4 to examine this.

The N4’s bolt assembly also has more serrations, in a slightly different orientation, on its bolt assembly gripping area, but still no charging handle as recommended on the N2’s tag. The ejection port on the blued prototype is also at a position closer to 12 o’clock when compared to the N2s.

Right side 2 Winchester SMG prototypes
Right side profile view of the two prototypes with their stocks deployed (Matthew Moss)

The N2 has a metal trunnion block, that the recoil spring guide rod screws into, this is held in place within the receiver by a cross pin. The bolt appears to be removed through the rear of the receiver once the stock assmbly/end cap is removed and the bolt assembly freed.

The folding stock was retained by spring tension of the wire metal stock against a wingnut-shaped catch that is riveted onto the recoil spring assembly cover. The stock is locked by a spring loaded push button system similar to the MP40s, this is not particularly sturdy. The shape of the wire stock itself is reminiscent of the US M3. When folded the butt of the wire stock acts as a front grip, the retention of the stock is surprisingly strong and stable.

Intriguingly, the Winchester Museum inventory notes that the guns are designated the N-1 and N-2, with an additional wooden model of the ‘Nato Burp Gun’ being transferred along with a box of duplicate parts in steel for the N2’s aluminium parts.

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Specifications:

Calibre: 9x19mm
Action: Blowback
Overall length: ?
Barrel length:  7.5 inches
Weight empty: ?
Magazine capacity: 33 rounds

Bibliography:

Winchester Repeating Arms Company: Its History & Development from 1865 to 1981, H. Houze (1994)


My thanks to the Cody Firearms Museum at the Buffalo Bill Center of the West for allowing me to examine and film the Winchester submachine gun prototypes. Special thanks to the CFM’s assistant curator Danny Michael for helping disassemble the N2.

All photographs taken by Matthew Moss, courtesy of the CFM & the Buffalo Bill Center of the West. Please do not reproduce photographs without permission or credit.

©The Armourer’s Bench 2018