A month ago I posted a short video from a range trip shooting the Remington M1917 at about 100m, getting a feel for the rifle and checking zero. I said in that video that I was planning on stretching the M1917s legs in the near future and last week I got the chance. I had the opportunity to shoot the rifle out to 700 yards (640m) which was a lot of fun.
With some 147gr S&B I managed a half decent score only missing twice out of 20 rounds. I’ve never shot out to 700 yards especially not with iron sights so it was a fun challenge, amazingly my last round was a bull, which was a real bonus!
We’re all familiar with the Heckler & Koch G3 and its roller-delayed blowback action. What is less well-known is that H&K were one of two companies originally contracted by the West German government to produce the Bundeswehr’s new service rifle. The other company was Rheinmetall and today we’re lucky enough to be taking a look at an example of an early production Rheinmetall G3.
The rifle which became the G3 was of course originally developed by German and Spanish engineers working at the Centro de Estudios Tecnicos de Materiales Especiales (CETME) and was intended to equip the Spanish armed forces. Initially, the West German Bundesgrenzschutz (border guards) were interested in purchasing a substantial number of the new CETME rifles, with an initial order for 5,000 agreed, however, in September 1955 the order was cancelled due to delays in production and the Bundesgrenzschutz subsequently ordered the FN FAL instead.
In November 1955, the Bundeswehr (West German military) was formed and began to search for a suitable new 7.62x51mm service rifle. Having observed the Bundesgrenzschutz’ testing the fledgling Bundeswehr took an interest in the CETEME rifle. 400 ‘STG CETME’ rifles were ordered for troop trials and these were assembled in Germany by Heckler & Koch. The rifles were delivered in late 1956, and comparative trials against the FAL began the following year.
The trials found the ‘STG CETME’ to be satisfactory in terms of features and design but lacking in durability. A number of small changes were requested including a flash hider suitable for launching rifle grenades, either a flip-up or dioptre rear sight instead of a traditional tangent style, a case deflector, a simpler more ergonomic pistol grip, a longer more ergonomic cocking handle, changes to the recoil spring guide and tweaks to the shape of the buttstock. Additional improvements such as a stronger bipod, lighter magazine, a last round hold open mechanism, overall lightening of the rifle, a lighter 20-round magazine and a proper handguard were also requested.
FN were unwilling to grant Germany a manufacturing license and the $110 per rifle price for the FAL proved substantially higher than CETME’s production estimates (The ArmaLite AR-10, J. Putnam Evans (2016), p.204). With adoption looking likely, legal wrangling over patent ownership began between Mauser, Rheinmetall and Heckler & Koch. All claimed the ownership of the roller-delayed blowback principle used by the CETME rifle. Eventually, however, the West German government awarded Rheinmetall and H&K future production contracts for the new rifle with the government supporting H&K’s claims but the legal battles continued for almost a decade.
In the meantime, with production of the CETME rifle not yet initiated and in light of some durability/reliability issues suffered during the STG CETME’s troop trials, 100,000 ‘Series C’ FN FALs were ordered for the Bundeswehr in late 1956. In 1957 the Swiss SIG 510 (designated the G2) and the American ArmaLite AR-10 (designated the G4) were also evaluated. Once the modifications requested after the troops trials were completed by H&K, a run of twenty rifles was produced and tested again.
In 1959, the West German government finally adopted the CETME rifle, designating it the G3. The German federal government decided that they wished to purchase the worldwide manufacturing rights to the G3, which naturally the Spanish government was reluctant to agree to. An agreement was finally reached in January 1958 and the contract giving West Germany worldwide rights to the G3 was finalised on February 4th, 1959.
One issue was that in June 1957, CETME had agreed a licensing deal for manufacture and sale of the rifle with a with a Dutch company Nederlandsche Wapen en Munitiefabriek (NWM). In order to gain the manufacturing rights sold to NWM the German government awarded the Dutch company a lucrative contract producing 20mm ammunition (Full Circle, p.234).
Interestingly, as the German government owned the manufacturing rights, H&K initially had to pay the government 4 Deutsche Marks per rifle, despite having been awarded the contract by the German government. In late January 1959, H&K were awarded the first substantial production contract, amounting to 150,000 rifles. Rheinmetall were subsequently awarded a similar contract (Full Circle, p.235).
According to R. Blake Stevens’ book on the roller-delayed blowback action, Full Circle, Rheinmetall produced 500,000 G3s during the 1960s, delivering 8,000 rifles per month (Full Circle, p.287). As H&K had been designated as the technical lead on the G3 project, Rheinmetall’s engineers made no attempts to develop modifications or improvements and even when H&K had switched to plastic furniture the Rheinmetall guns continued to use wood. Rheinmetall’s only other G3-related project was the RH4, a 7.62x39mm chambered, roller-locked but gas-operated rifle designed for export (Historical Firearms).
In addition to the G3, Rheinmetall were the sole manufacturer of the MG3, the 7.62x51mm MG42. Blake Stevens explains that in 1969, when a new tender for G3 production was due, that H&K moved to undercut Rheinmetall who had until now held the monopoly on MG3 production (Full Circle, p.292). As a result an agreement was reached where Rheinmetall retained their monopoly on MG3 production and H&K became sole manufacturer of the G3 for the West German military.
Examining An Early Production Rheinmetall G3
The G3 went through a large number of changes both before and after it went into service. The rifle we’re examining today is a good example of an early production rifle, as adopted in 1959. This rifle is lightly marked with ‘G3 [Rheinmetall’s ‘star-in-a-circle’ logo] followed by a serial number of 745 and below that it is date marked with the ‘3/60’, for March 1960.
Working our way from the muzzle back; the rifle has the early style of flash-hider/grenade launcher support which was introduced in 1957 and altered in early 1961, an enclosed front sight and a detachable bipod (which was not Bundeswehr general issue). It has a stamped metal handguard which was replaced by one with a wooden insert in 1961, before H&K introduced plastic furniture in 1964.
The folding carrying handle seen on the troop trials rifles has been removed, the receiver is stepped for the attachment of a scope base and the magazine housing has a single strengthening rib, rather than the later ‘full-frame’ continuous rib. It has an S-E-F selector (S – Sicher/safe, E – Einzelfeuer/semi, F – Feuerstoß/auto) and black plastic pistol grip. Internally, the rifle has a captive mainspring. Unlike later G3’s the rifle has a 2-position folding L-shape rear aperture sight with apertures for 200 & 300 metres rather than the later dioptre sight adopted officially in mid-1960. The rifle has a wooden stock held with a stamped metal sling attachment and a plastic buttplate.
This week’s episode is a short video of my first trip to the range with the Remington M1917. I basically wanted to get an overall feel for the rifle and see how the zero was. It was a beautiful day, and shooting the M1917 was a lot of fun.
I did take along my proper video camera but in a profoundly rookie move, I forgot to check it had a memory card in it. So had to improvise and use my phone, the results aren’t too bad!
The only range available that afternoon for zeroing was a 100 yard range. The first increment on the M1917’s ladder sight is 200 yards, so I set my aperture a little lower and put 8 rounds of 123gr SAKO .30-06 through the rifle, just to see where point impact was.
The results were better than I expected. With a six-oclock hold on the 7 ring I got a spread of about 7 inches. This was entirely due to me get used to the rifle and forgetting to bring along a rest. I was just pleased to see rounds on paper. My groups tightened up as the afternoon went on and I’m definitely looking forward to getting to the range with the M1917 again – hopefully with a memory card!
We’ll take an in-depth look at this rifle in the future, and we’ll hopefully have videos on its British predecessors too. In the meantime, bonus video here.
Heckler & Koch’s first 5.56×45 rifle, the HK33, was introduced in the late 1960s as a response to the emergence of the new 5.56x45mm round and the introduction of the FN CAL. The HK33 is little more than a scaled down version of HK’s successful 7.62×51 G3. Developed by Tilo Möller, the HK33 used the same roller delayed blowback action and shares most of the G3’s features.
It has a stamped receiver and uses the same plastic furniture and pistol grip/trigger mechanism housing as the G3. The rifle is 39 inches or 92cm long and is by no means a light weapon, weighing around 4kg or 8.7 lbs. The HK33 feeds from 25, 30 or 40 round proprietary HK magazines.
The rifle came in main two main variants a full length version with a fixed stock, which could be fitted with a collapsing stock, and a shortened K-variant with a shorter barrel. The weapon came with either a safe, semi and full auto or safe, semi, 3-round burst fire control mechanism.
The HK33 was not adopted by the West German Army, however, it did see extensive use with Germany’s federal state and police forces and the Bundeswehr special forces. While it wasn’t adopted at home it was a successful export weapon with dozens of countries purchasing and adopting the rifle. France tested the improved HK33F in the Army 1970s and although it performed well the FAMAS was adopted instead. A production license was sold to Thailand who adopted the HK33, purchasing 40,000 rifles and the license to manufacture 30,000 more. Thailand also developed their own unique bull pup version of the rifle, the Type 11.
Malaysia also purchased 55,000 HK33s and the Spanish Guardia Civil used them for a time. The manufacturing rights for the HK33 were also sold to Portugal for production at Fabrica Militar de Prata and to Turkey where it remains in production at MKEK.
HK produced the HK33 from 1968 through to the late 1980s. It also provided the basis for the HK53 5.56 ‘submachine gun’ which we have covered previously. It was also the basis of the less successful G41, which we’ve also covered in a full length episode, you can find this here. The similarities with the HK33 are easy to see but the G41 has a number of subtle changes.
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In early 1865, in the wake of the Danish-Prussian War which had shown how effective breechloaders could be, Britain’s Board of Ordnance began to explore retrofitting Britain’s muzzle-loading Pattern 1853 Enfield Rifle Muskets with a breech-loading cartridge conversion. Along with this interim solution the Ordnance Department also began the search for a breech-loading rifle designed from the ground up. Dozens of designs were examined from engineers and gunsmiths from across Britain, Europe, and the United States. One of these came from Johann von der Poppenburg, a Birmingham based engineer. Poppenburg’s rifle was tested along with 24 others during the initial phase of testing. The Ordnance Department’s Breech-Loading Rifle Committee were largely unimpressed by the rifles submitted and selected only four to progress, Poppenburg’s design was not included.
Poppenburg patented his first breech-loading design in February 1865 (#421) with an American patent following in October (US #50,670). It was this system which was first submitted to the trials, the rifle while described as ‘Poppenburg’s principle’ was made or at least submitted by Messers. Benson and Co., also of Birmingham.
Poppenburg’s patent describes a system that could be loaded with either loose powder and a projectile – with a percussion cap igniting the charge held in the ‘charge-chamber’ or with a paper cartridge which was detonated when pierced by a needle. It was the latter, more modern, option which was chosen for submission to the British trials.
The submitted design used a needle fire action, which ignited a paper cartridge by piercing through the paper and powder to ignite a copper cap in the base of the projectile. Poppenburg patented this cartridge design was on 3rd April 1865 (#932), it lapsed three years later and became void in April 1868. The action was hinged to the right, with a hollow breech chamber swinging out to allow a cartridge to be loaded into it. The estimated unit cost to produce these rifles, for quantities over 5,000 rifles, was £3 each. The needle fire action and hinged breech proved “too complicated, and liable to accident for a military arm” according to the Trials report.
Interestingly, in October 1866 Poppenburg also patented specific system for a breech-loading conversion (#2580). The system used a vertically hinged breech block which locked using a rack and pinion system attached to a lever. It does not appear that this system was tested by the Trials Committee. This action may have been developed following the failure of his more complex action and the adoption of the brass-cased .577 round. This patent lapsed and became void in October 1869.
The October 1866 patent (#2580), appears to be the last patented solely under Poppenburg’s name. Subsequently patents were granted jointly between Poppenburg and John Solomons Benson. This may have been due to the cost of applying for and maintaining patents, which in the 1860s could cost over £45 for three years of protection. Today that’s the equivalent of over £5,000 or nearly $7,000. Both Benson and Poppenburg were based in Birmingham, Britain’s leading centre for small arms manufacturing at the time. In a patent notice, dated 22nd December 1866 (#3382), Benson is listed as a merchant while Poppenburg is described as a mechanical engineer. It may be that Benson provided the financial backing for Poppenburg’s breech-loading system, this was an arrangement that was common at the time.
In 1866-7 Benson and Poppenburg submitted a number of rifles for testing in the Prize Competition launched by the War Office to find a new breech-loading rifle. The system submitted was radically different to Poppenburg’s earlier needle fire designs which used hinged breeches. The patent for the new system was granted jointly to Benson and Poppenburg on the 22nd December 1866 (#3382).
Benson and Poppenburg’s new rifle had a breech which opened horizontally with a ‘tubular breech-block’ which slid to the rear when a hinged lever was liftedand pulled backwards. To open the breech the rifleman first depressed a small catch on the left side of the breech cover, once depressed the breech block could then be pulled back by the hinged lever. This movement also actuated the rifle’s T-shaped semi-circle extractor allowing the rifleman to remove the spent case. A new cartridge could then be loaded and the breech closed and the striker was then pushed forward with the thumb to cock the weapon. Once the hinged lever was pushed forwards again the breech block moved forward, closing the action, and locked with a pair of lugs cut into the receiver (described as the ‘breech-shoe’ in the patent) and at the rear by the catch.
Depressing the breech release button with the striker cocked will de-cock the action and in theory allow a round to be carried in the chamber. The example pictured in the accompanying photographs may be a slightly more refined version of the rifle submitted as it differs from another rifle, said to be a trials gun, which more closely resembles the December 1866 patent.
Breech Closed (Matthew Moss)
Breech Open (Matthew Moss)
The rifle with its breech closed (left) and open (right)
At least four rifles (with some differences in design between them) were provided for testing, the War Office’s April 1868 Report on Breech Loading Arms found that three of the rifles submitted were shorter than the required length while a fourth was too long – with the maximum overall length allowed being 51 inches. Examples of both full-length rifles, with 32 inch barrels, and carbine models with 23½ inch barrels exist (both of these lengths are significantly shorter than the Snider-Enfield’s barrel length). The trials rifles appear to have been sighted out to 1,100 yards and were chambered in a .577 calibre cartridge (probably the Boxer cartridge selected officially in 1866). At least two probable trials example were also chambered in a .450 cartridge. From a survey of the remaining examples it seems that the serial numbers for the rifles range up to at least 239.
The Benson-Poppenburg was unsuccessful during the trials, being rejected from both the Prize Competition and the Breech Action Selection Trials. With the Committee’s report stating that despite the rifles having “several good ideas embodied in their breech action”, they “appear to have been hastily manufactured and the inventions are as yet in an incomplete state”. The specific reasons given for this were that the rifles were of unsatisfactory overall lengths. It seems they were submitted in a rush, in an ‘incomplete state’, with the report also noting that the extractors on two of the rifles submitted destroyed cartridges during extraction, probably ripping the base from the case.
The Committee’s report explained that its rejection from the separate Breech Action Selection Trials was due to issues: “if dirt or sand enters the shoe of this rifle it causes misfires, and even prevents the bolt from entering the aperture in the block.” They also noted that “The working of the breech mechanism is slow.”
The British Army’s extensive trials eventually resulted in the selection of Jacob Snider’s system, adopted in April 1866 to convert existing Pattern 1853s and the selection of Friedrich von Martini’s action and Alexander Henry’s barrel, which when combined as the Martini-Henry was formerly adopted in March 1871.
Mathieu Willemsen, curator of the Netherlands’ Military Museum, was kind enough to share some information about The Dutch Army’s trials with the Poppenburg in 1868. The Dutch trialled a version similar to that tested by the British but chambered in 11x42mmR. The rifle’s action has a more angled external appearance than the example we have examined but works along the same principle.
The rifle was found to be rapid firing but suffered from some issues with fouling and failed a pressure test. Later testing with a smaller calibre round was also carried out but the rifle was not adopted. We hope to have a chance in the future to examine a Dutch trials rifle for comparison.
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Treatise on the British Military Martini, I. Skennerton, (1995)
Reports of a Special Committee on Breech-Loading Rifles (1869)
Abridgements of the Specifications Relating to Fire-Arms and Other Weapons, Ammunition, and Accoutrements, Commissioners of Patents, (1870)
‘Poppenburg’s Projectiles’, Newton’s London Journal of Arts and Sciences, (January, 1866)
Experiment and Trial, M. Willemsen (2012)
Various British Patents:
‘Breech Actions, Hinged-Chamber’, J. von der Poppenburg, UK Patent #421, 14th Feb. 1865
‘Projectiles and cartridges for central-fire breech-loading fire-arms and ordnance’, J. von der Poppenburg, UK Patent #932, 3rd Apr. 1865
‘Breech Actions, Hinged Breech-Block’, J. von der Poppenburg , UK Patent #2580, 6th Oct. 1866
‘Breech Actions, Sliding Breech-Block’, J.S. Benson & J. von der Poppenburg, UK Patnet #3382, 22nd Dec. 1866
‘Breech Actions, Hinged Breech-Block’, J.S. Benson & J. von der Poppenburg, UK Patent #1950, 15th June, 1868
‘Improvement in breech-loading fire-arms’, J. von der Poppenburg, US Patent #50670, 24th Oct. 1865, (source)
Special thanks to our friends at the Hayes Collection for letting us examine their rifle, and thanks to David Minshall over at the Research Press for his help researching Poppenburg’s numerous patents.
In 1981, Heckler & Koch introduced what would be their last infantry rifle that used their tried and tested roller-delayed blowback action, the HK G41. In October 1980, following NATO’s smalls arms and ammunition testing during the late 1970s, a meeting of NATO Armament Directors, agreed to standardise to the 5.56x45mm round favoured by the United States since the mid-1960s. Standardisation Agreement (STANAG) 4172 saw NATO standardise on the Belgian/FN SS109 ball round. At the same time Draft STANAG 4179 proposed adopting US 30-round M16 magazines as the standard 5.56 magazine pattern, while this proposal wasn’t ratified the M16’s magazine became the de facto standard.
At this time Heckler & Koch were engaged in a major engineering project to develop the G11 caseless ammunition-firing individual weapon. Their main offering for the 5.56x45mm rifle market at the time was the HK33, a rechambered version of the 7.62x51mm G3 developed by Tilo Moller, which was introduced in 1965. The HK33, however, used a proprietary HK magazine and was not compatible with the M16’s magazines. In 1977, as the NATO trials began and it became clear that 5.56x45mm would be adopted, HK began to develop what would become the G41. In 1979 with initial development completed HK submitted 18 G41s for testing with the West German Army. It wasn’t until 1981 that HK introduced the G41 onto the market.
While continuing to use the same roller delayed blowback operating system as the G3, HK33 and MP5, the G41 embodied a number of improvements. While still using a stamped metal receiver it utilised 1mm thick high tensile steel rather than the 1.2mm thick steel used by the HK33. This helped to lighten the receiver. The new rifle also used a lighter bolt assembly, paired with a new recoil spring which comprised of five wound strands around a central coil, rather than a single coil, which had a longer stroke. This acted to lower the felt recoil. The G41, however, had a higher rate of fire at around 850 rounds per minute compared to the 750 rounds per minute of the HK33. Some of the G41’s bolt geometries were reworked and a new extractor was added.
The G41’s lower receiver was redesigned to allow the rifle to feed from STANAG magazines rather than HK’s earlier proprietary magazines. The cocking lever and forward assist were taken from the HK21A1 (XM262) general purpose machine gun, developed for the US SAW trials.
It also had a new more triangular polymer foregrip and added a plastic dust cover to the ejection port, a NATO pattern optics mount (meeting STANAG 2324) replaced HK’s claw-mount system, and a spring-loaded folding carrying handle near the centre of balance was added. Importantly it also added a last round hold open device and a bolt release catch, on the left side of the lower receiver.
The usual thumb serrations on the side of the bolt, for pushing the bolt home, were replaced by a prominent forward assist, similar to that found on the M16A1 and other HK weapons such as the HK21 light machine gun and the PSG-1 sniper rifle. HK sales literature described it as a ‘low noise’ forward assist and the manual describes the “quiet cocking of the weapon” – essentially riding the cocking handle back into battery and then pushing the forward assist to lock the action, the system is not as ‘low noise’ as advertised.
Another important feature of the rifle was the inclusion of a three-round burst setting alongside semi and fully automatic. The G41 could mount a standard G3 bayonet, fit an M16 bipod and had a flash hider designed to enable it to fire NATO standard rifle grenades. The 40mm HK79 under barrel grenade launcher could also be mounted to all variants of the G41, simply swapping it out for the polymer forend. HK referred to this set up as the G41-TGS or ‘Tactical Group Support system’.
The G41 came in a number of variants with designations A1 to A3. The base rifle had a fixed buttstock and its rifling had 1 turn in 7 inches with a right-hand twist, in a 18.9 inch barrel. The A1 had a 1 in 12” twist barrel and fixed buttstock. The A2 had a collapsing, single position stock and 1 in 7” inch twist rifling, while the A3 had 1 in 12” inch twist rifling. The 1 in 7” rifling was optimised for the new SS109, while the 1 in 12” optimised for the US M193 round. There was also a shortened G41K model which had a collapsing stock and a 15 inch barrel available with both rifling types.
One of the main issues with the G41 was its weight. Despite efforts to lighten the sheet metal receiver, it weighed more than its predecessor the HK33. According to measurement data compiled by researcher Nathaniel F, unloaded the G41 weighs in at 4.31kgs or 9.5 lbs, this is a full pound heavier than the HK33. A contemporary M16A2 weighed 3.39kg or 7.5 lbs while the Spanish CETME L, a similar stamped receiver rifle chambered in 5.56×45, weighed 3.72kg or 8.2 lbs. The rifle eventually adopted by the Bundeswehr, the HK G36, weighed 3.13kg or 7.3 lbs. The G41K with its collapsing steel stock wasn’t much lighter, weighing 4.3kg or 9.5 lbs, according to HK sales literature. Another potential issue may have been reliability with the move to the STANAG magazine rather than the optimised proprietary HK magazines may have introduced some issues.
Following NATO’s decision the early 1980s saw a large number of countries looking to replace their ageing 7.62x51mm battle rifles. Sweden began to look for a 5.56x45mm rifle to replace its licensed version of the G3, the Ak4, in the late 1970s. HK could initially only offer the HK33 but the G41, tested later, was also rejected by the Swedes in favour of FN’s FNC. Italy sought to replace the BM59 with a more modern rifle and HK entered into an agreement with Luigi Franchi which saw them offer both the original HK configuration and the develop their own, slightly modified version, the Franchi mod. 641, but the Beretta AR70/90 was selected. Similarly, in 1984 Spain decided to adopt the indigenously developed CETME L. In 1986 the HK G41 was also submitted to the Irish Army’s trials to replace the FN FAL, it was beaten by the Steyr AUG. Initially West Germany had hoped to procure up to 20,000 HK G11 rifles per year, with a total of 224,000 in service by 2003.
The collapse of the Soviet Union and the subsequent reunification of Germany saw Federal budgets stretched and the G11 programme was subsequently abandoned entirely. The Bundeswehr still needed a suitable rifle to replace the G3 and in the 1990s sought a lighter weight rifle. HK felt their HK50 project, in development since the mid-1970s was a better bet than the heavier G41, and following Bundeswehr trials the G36 was subsequently adopted in 1997. Sadly, I have not been able to get a hold of any of the trials reports from the nations that tested the G41, so can not say with certainty why the countries mentioned above rejected HK’s rifle.
From photographs of members of the Turkish Gendarmerie special operations group training at the Foça Commando School, dating from the early 2010s, it appears that Turkey either purchased a number of G41s or Turkey’s state-owned defence manufacturer, MKEK, produced an unknown number under license.At some point in the 1980s the British Army also tested a small number G41s with serial numbers #11131, #11832 and #11833 remaining in UK collections.
Denmark’s elite Jaegerkorpset and Froemandskorpset used the G41 for a time and Argentina’s special forces, including the Grupo de Operaciones Especiales, have also been photographed with both HK G41s and G41A2(collapsing stock) fitted with the TGS package comprising of the HK79 under barrel grenade launcher.
The G41 represents the last evolution of HK’s infantry rifles using the roller delayed blowback action. It comes from a period when HK were developing what they hoped would be the next generation of small arms technology and with the collapse of the G11 programme and the lack of interest in the G41 the company faced financial uncertainty throughout the early 1990s. HK’s move away from the roller delayed blowback action to a more conventional gas operated rotating bolt system, combined with lightweight polymers, in the G36 proved to be more successful than the ill-fated G41.
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This video marks our 40th episode, thanks for watching/reading, lots more to come!
In this episode Matt had the chance to put a few rounds through a replica of a Gerat 06(H). German development of the 06(H) began at Mauser in mid-1944. The 06(H), sometimes referred to as the StG 45(M), was developed from the earlier Gerat 06 which used a gas operated, roller-locked action designed by Wilhelm Stahle.
One of Mauser’s scientists, Dr Carl Maier, analysed the 06’s action and noticed bolt bounce before the action locked. From this he calculated that the heavy gas system could be removed and the bolt simplified by using a roller delayed, rather than locked, blowback action. This is where the rifle gets its “H” suffix, meaning “half-locked”.
The rifle is chambered in 7.92×33 Kurz, feeding from a 30-round StG-44 magazine. It has a stamped sheet metal receiver and an in-line layout, sending the recoil impulse straight back. Despite being lighter than the 06, the 06(H) is equally controllable and handier than its heavier predecessor.
The 06(H) is the genesis of the roller-delayed blowback action line of rifles that progressed through work at CEAM in France, developments in Spain at CETME and finally back in Germany at HK. We’ll have a full video discussing the design, development and history of both the 06 and 06(H) in the future and we’ll also delve deeper into the evolution of the roller-delayed blowback system and the rifles that used it.
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Thanks to our friend Chuck over at GunLab for allowing me to shoot his replica 06(H) and helping with filming.