Sometimes all is not as it seems. That was the case when we examined this Steyr AUG. From the barrel and bipod it appeared to be an AUG in an HBAR or Heavy Barrel configuration but on closer inspection we found that it was in fact a rifle receiver, bolt and bolt assembly and chassis that had been paired with an HBAR barrel assembly.
Ordinarily, the HBAR could be modified to fire from an open, rather than closed, bolt. This example has the standard AUG progressive trigger for semi and full-auto. It does not have the modified bolt carrier, striker or trigger mechanism.
The HBAR has a 4x optic, rather than the rifle’s 1x, while the HBAR-T can be fitted with an optic like a Kahles ZF69 6×42.
Adoption of the AUG HBAR does not appear to have been widespread and Steyr don’t currently list it as an option amongst their upgraded AUGs. For more Steyr we have previously examined a Steyr AUG SMG conversion and a Steyr MPi 81. We’ll take an in depth look at the AUG and AUG HBAR in the future.
Overall Length: 35.5in (90cm)
Barrel Length: 24.4in (62cm)
Weight: 8.6lb (3.9kg)
Action: Gas operated, rotating bolt – the HBAR typically fires from an open bolt, but this rifle-based example fires from a closed bolt.
Capacity: 30 or 42-round box magazines
The Diemaco M203A1 is a development of the M203 40x46mm low velocity grenade launcher. The M203 was initially developed by AAI to replace the Colt XM148 which proved overly complex when tested in Vietnam.
The Diemaco M203A1 improves on the earlier launcher by incorporating its sight into the mount rather than being atached to the top of the barrel. The Diemaco M203A1 should not be confused with the Colt-manufactured M203A1 in US service. The Diemaco launcher is offered alongside the C7 and C8 rifles made by Diemaco (now Colt Canada).
Diemaco developed the M203A1 so it has a longer action, with the breech opening further to allow the firing of all 40×46 mm LV grenades including less than lethal baton rounds. It can also be mounted on all AR-patterned rifles as well as the Steyr AUG.
Like the original M203 the launcher can be operated by either a left or right handed users. The original model had an iron sight assembly has dual azimuth adjustment knobs and an elevation dial, this model, however, has a simplified tangent sight. Diemaco stated that the M203A1 has a maximum effective range of 400m (440 yd) with a muzzle velocity of 78 m/s (260 ft/s).
The M203A1 was tested by the UK’s special forces in the late 1990s, when they evaluated the Diemaco SFW carbine, which was subsequently adopted as the L119A1. The Heckler & Koch M320 GLM (HK AG36) has since been adopted by the British Army.
Calibre: 40 mm
Loaded Weight: 2.15 kg (4.74 lb)
Empty Weight: 1.85 kg (4.08 lb)
Overall Length: 318 mm (12.52 in.)
Barrel Length: 228.6 mm (9 in.)
Overall Height: 140 mm (5.51 in.)
Rifling: Right Hand Twist – 6 Lands
Rate of Twist: 1 turn in 48 in. (121.9 cm)
Developed in the late 1960s and introduced in 1969/70 the MPi 69 was Steyr’s entry into an already crowded European submachine gun market. Heavily influenced by the Israeli Uzi it had a bolt which telescoped over the barrel and fed from a box magazine that was inserted through a magazine well-come-pistol grip.
The MPi 69 weighed 6.5lbs (2.93kg) unloaded and had a polymer lower receiver into which a stamped metal upper inserted. Unlike the Uzi it had a collapsing, rather than folding stock, similar to the M3 submachine gun’s, and was cocked not by a handle but by pulling the sling (which was acted on the bolt) to the rear.
The MPi 69 remained in production into the early 1980s when it was replaced by the improved MPi 81. Moving away from the slick-cocking ‘gimmick’ the MPi 81 had a conventional, non-reciprocating, charging handle on the left side of the receiver. The MPi’s polymer lower allows it to be a pound lighter despite being slightly longer as a result it also balances better than the standard Uzi carbine.
The MPi submachine guns fire from an open bolt and had a 10in barrel and has a push through safety with settings for safe, semi and full auto and unlike the Uzi it does not have a grip safety – simplifying manufacture.
The MPi also has a progressive trigger which when set to full-auto will allow the user to fire semi when pulled to the first stage and full when pulled fully to the rear. While the MPi 69 had a cyclic rate of around 500 per minute, the MPi 81 increased this rate to ~750rpm.
The MPi can be field stripped by simply rotating the receiver end cap up 90-degrees and pulling the bolt out the rear. The gun can be further stripped but the moulded polymer lower receiver can be difficult to remove from the upper. Like the Uzi the barrel nut is unscrewed to remove the barrel.
It is unclear just how many MPi submachine guns were produced but they didn’t see any significant contracts beyond a few small sales to police forces and militaries.
The MPi 81 remained in production into the early 1990s when it was replaced by the smaller and more compact Steyr TMP in 1992. In turn the TMP design was sold to B&T a decade later.
Our thanks to the collection that let us take a look at this MPi 81 and to our friend Miles Vining for sharing some of his shooting footage of the MPi 81 with us, check out his video here and more of his work at www.silahreport.com.
Whilst looking through the piles of surplus ‘kit’ in my friends warehouse in Germany I came across an interesting find, an Explosive Ordnance Disposal (EOD) training kit that has several examples of WWII and after ordnance that might be found on training grounds and former battlefields throughout Europe.
One of the elements from that training kit was a PIAT or Projector, Infantry, Anti-Tank, round. Many of these have been found across northwest Europe since the end of WWII and it was important for EOD teams to be able to identify them and understand how they work in order to safely dispose of them.
This example is likely an ‘instructional’ round that may have been produced from a previously live round and not subsequently marked as inert. In the video, which was filmed on location from memory, I mentioned that the charge was inside the front cone. Instead the charge was actually just behind the steel cone, which acted as a forcing cone, and has seen been replaced by some sawdust. We can see this in the diagram below, which shows an earlier Mk round but the configuration remains the same:
This time we examine an example of the Mk3 PIAT Bomb. When I filmed the video I wasn’t sure of the markings but this chart below more clearly explains them:
There were 7 marks of PIAT bomb:
MkI yellow/green/yellow band 808 stamped on green band, red x’s around nose cone
Mk2 as above
Mk3 yellow/blue/yellow band TNT stamped on blue band, red circle around nose cone
Mk4 as above
Inert bomb black with yellow band INERT in white
Drill bomb black with DRILL in white x 2
Practice bomb – to fit the practice insert tray, painted white and it looks nothing at all like a PIAT bomb!
Our inert bomb isn’t painted black, instead it is painted up as a Mk3 to emulate what a live blind found in the field would look like.
Here’s an extract from the PIAT’s manual explaining how the fuze was fitted to a live round:
From the PIAT manual: The fuze. – Until required for use the fuze is kept in a container attached to the drum tail by a spring clip….
ii. To fuze. – Remove the fuze container from the drum tail and take out the fuze. Remove the thimble from the bomb nose by pressing it downwards and turning it clockwise. Remove the transit plug from the fuze chamber and insert the fuze flat end first. Replace the thimble. The transit plug should be placed in the fuze container and the latter put in the carrier, in case the bomb should later have to be unfuzed.
We’re proud to present our very first bayonet-centric episode. Vic takes a look at a bayonet for a Sudanese contract AR-10 as part of his ongoing Surplus Zone series. While a rather rare bayonet this example has some interesting features.
In 1958 the Sudanese Military contracted with Samuel Cummings company Interarmco, to supply 2,508 AR-10 Battle Rifles. 2,500 standard rifles and 8 adapted to mount optical sights as sniper rifles.
One of the requirements for the Sudanese rifles were that they were to be able to mount bayonets, something the AR-10 did not have a capability to do in its then current form. This inability to mount a bayonet was overcome by a rather simple and ingenious addition to the rifle. A cast and machined sleeve was fitted over the barrel between front sight base/gas block and the flash hider. This was pinned to the barrel just forward of the front sight base/gas block. It had machined into the underside of the bayonet adaptor a longitudinal rail to which the bayonet could be attached. This is the same interface as seen on WWII German issued Kar98K rifles, the significance of which will become clear!
It is uncertain why Interarmco chose the design of bayonet which they did. It would have been quite an expensive and complex one to manufacture but it is obvious that it is based upon the late WWII SG-42 bayonet come utility/fighting knife. The Sudanese contract AR-10 bayonet has a more symmetrical blade than that of the SG-42 and has no ‘blood groove’ (properly known as a fuller) which hints at the fact that it is seen more of a utility knife than as a ‘cut and thrust’ fighting knife/bayonet.
It has been established that the SG-42 was manufactured by Waffenfabrik Carl Eickhorn in Solingen, Germany (determined by its cof marking / WaA19 inspection code), whereas the toolkit was made by Robert Klaas of Solingen (inspection code: ltk). Inside the bayonet’s grip are a number of tools which detach from the grip and can be used for rifle maintenance. The tools also include a bottle opener and a corkscrew. Inside the toolkit stored in the bayonet’s grip are a number of tools which detach from the grip and can be used for rifle maintenance. The tools also include a bottle opener and a corkscrew.
In regard to the AR-10 Sudanese bayonet, the Eickhorn company does not deny being the manufacturer of the Sudanese contract bayonet, they simply cannot confirm that they were the maker, since all relevant factory records have been lost!
In the Dutch AR-10 archives, Interarmco (i.e. Samuel Cummings) does not disclose the name of the manufacturer, but refers only (in the pertinent correspondence with A.I.) to “the Solingen manufacturer” of this knife-bayonet for the Sudanese contract.
Check out Vic’s earlier Surplus Zone videos hereand his special series on the AR-10 here.
In my travels across Europe in search of subjects for filming of our channel I have come across several ‘Surplus’ small arms dealers who have generously allowed me to film some of the interesting items and complete guns that are and will be subjects of some of my episodes in this ‘Surplus Zone’ series.
In this episode we examine ‘a Trio’ of AR10 rifles, unfortunately none of which are complete but they are all in exceptionally good condition.
It was explained to me that in or around 2001 Artillerie-Inrichtingen (AI), the company in the Netherlands that manufactured the AR10 rifle under licence from ArmaLite, were replaced by Eurometaal, then Rheinmetall. At this time a small cache of AR10 rifles, some complete and some incomplete, as well as a quantity of ‘new old stock’ parts were found and subsequently sold off.
These three incomplete AR10 rifles, which are the subject of this episode, appear to be built up from parts from this cache. They are not completely ‘correct’ to any known researched model but do follow the pattern of known examples. All three have been deactivated to the old German spec.
First, is a ‘Portuguese pattern’ rifle with a bipod is minus several parts (handguards, gas regulator, and bolt & bolt carrier) but is generally correct.
The second rifle is a ‘Sniper pattern’ rifle, which follows generally the design attributes of a Sudanese sniper rifle but does not have the rear sight graduations marked in Farsi. The butt stock does not have a brass marker disc and the barrel does not have the second pin cut that would retain the Sudanese bayonet mounting sleeve. It is also missing several parts (front sight block/gas regulator, gas tube, and bolt & bolt carrier).
The final rifle is quite a find, in that it is an undocumented pattern rifle. The lower receiver appears to have an in-factory modification, with the magazine well being cutaway/sculpted in the general pattern of the semiautomatic only ‘civilian’ prototypes or perhaps it is utilises a lower receiver that would have been modified to utilise a curved magazine… perhaps a 7.62x39mm Finnish prototype?
Enjoy the episode and if you have any thoughts or actual knowledge of the source of these rifles please share the information with us. Please also check out my earlier videos on the AR-10, here & here.
Vic continues his Surplus Zone series with a look at the British SUSAT sight, principle by Britain on the SA80 and by Spain with the CETME Model LV and AMELI. In this episode Vic shows us how to refit a SUSAT with new elements.
The Sight Unit Small Arms, Trilux was developed in the late 1970s by the Royal Armaments Research Development Establishment. It is a 4x optic which uses a radioactive tritium light source, for use in low light conditions, which due to radioactive decay has to be replaced every 8-10 years.
Vic has been busy travelling around Europe with his day job and has had the opportunity to visit some surplus dealers. He’s back with a new series of videos, ‘the Surplus Zone’, he’s going to show us some of the interesting, and in some cases extremely rare, things that are sometimes available on the European surplus market.
The series will included AR-10 parts, SUSAT scopes, Italian Garand receivers and much more!