Microtech MSAR STG 556
On Point Firearms is proud to carry the new Steyr Aug clone by Microtech Small Arms Research– the MSAR STG 556. Introduced at the 2007 SHOT Show, the MSAR STG-556 is manufactured by Microtech Small Arms Research Inc. ( a subsidiary of Microtech Knives) and is an AUG A1 clone significantly re-engineered in its working system and principle as it features a forward assist and a bolt hold-open device as seen on the M16A2; otherwise the MSAR STG-556 retains the original AUG features, such as feeding from proprietary translucent plastic magazines and having the quick-change barrel option. It is available in either civilian, semi-automatic only and military/LE, select-fire variants. microtech msar, microtech stg556, microtech small arms research, microtech knives, ultratech microtech, halo microtech, microtech knife, otf microtech, microtech switchblades, terzuola microtech, microtech combat talon, microtech mtx2, microtech makora, microtech utx70, microtech udt, scarab microtech, microtech lightfoot, aamc msar, microtech amphibian, microtech card reader, zio microtech, microtech switchblade, microtech cameramate, microtech ecu, microtech cmtx5, microtech scanners, microtech hd50, microtech automatics, microtech socom, microtech dragon slayer, microtech ut6, msar medical, microtech automatic, microtech computers, microtech blade, suss microtech, microtech geffel, microtech driver, microtech double action
The AUG is an Austrian 5.56 mm assault rifle, designed in the early 1970’s by Steyr Mannlicher GmbH & Co KG (formerly Steyr-Daimler-Puch). The AUG (Armee Universal Gewehr - “Universal Army Rifle”) was adopted by the Austrian Army as the StG 77 in 1977, where it replaced the aging 7.62 mm StG 58 automatic rifle (a license-built FN FAL). In production since 1978, it is the standard small arm of the Austrian Bundesheer and various police units. It has also been adopted by the armed forces of Argentina, Australia (accepted into service in 1985 and manufactured by Australian Defence Industries in Lithgow, this Austeyr model is also in use by New Zealand), Bolivia, Ecuador (1988), Ireland, Luxembourg, Saudi Arabia, Tunisia (introduced in 1978), Pakistan and since 1988, the US Immigration and Customs Enforcement agency.
The AUG was designed as a family of weapons that could be quickly adapted to a wide variety of roles with the change of the barrel to a desired length and profile, among which are: a compact (350 mm (13.8 in) barrel, carbine (407 mm (16 in)), standard rifle (508 mm (20 in) ) and light machine gun (621 mm (24.4 in)). The AUG is a modular weapon in the bullpup configuration that employs a high level of synthetic and advanced alloy components.
The primary (military) variant of the weapon designated the AUG A1, consists of six main assemblies: the barrel, receiver with integrated telescopic sight, bolt and bolt carrier, trigger mechanism, stock and magazine. The AUG is a select fire rifle with a gas piston operated action that fires from a closed bolt. The rotating bolt features 7 locking lugs and is unlocked by means of a stud on the bolt body and a recessed camming guide in the carrier’s surface. The bolt carrier itself is guided by two rods inside the receiver with two recoil springs directly behind it, around the two spring guides. The bolt contains both a claw extractor and a case ejector. The firearm uses: a short stroke piston system (the right guide rod serves as the action rod, transmitting the rearward motion of the gas driven piston to the bolt carrier), a 3-position gas valve (the first setting is used for normal operation, the second setting - fouled conditions while the third, closed position is used to launch rifle grenades), a two-stage trigger (pulling the trigger halfway produces semi-automatic fire, pulling the trigger all the way to the rear produces fully automatic fire) and a safety mechanism (cross-bolt, button type), located above the grip. In its “safe” position the trigger is mechanically disabled.
The weapon is fed from translucent, double-column box magazines (molded from a high-strength polymer) with a 30-round capacity and an empty weight of 130 g (4.59 oz). The light machine gun version of the AUG uses an extended 42-round magazine. After expending the last cartridge the action is held in its rear position by a bolt hold-open device.
The quick-change barrels used in the AUG series are cold hammer forged for increased precision and durability, their bores and certain components of the gas system are chromium plated. The barrels have 6 grooves (right hand) at a twist of 228 mm (9 in). They lock into a steel insert inside the receiver via 8 lugs and are equipped with folding, vertical grips that are used to rotate the barrels during changing. The most compact of the barrels has a fixed vertical grip. Flash hiders were used on 350 mm (13.8 in), 407 mm (16 in) and 508 mm (20 in) length barrels, whereas the 621 mm (24.4 in) barrel received a muzzle device (combination flash suppressor and compensator) and a lightweight folding bipod. Rifles outfitted with 407 mm (16 in) and 508 mm (20 in) barrels are able to use rifle grenades. Furthermore, 508 mm (20 in) pattern barrels produced for military purposes are equipped with a bayonet lug. The manufacturer also offers two other 508 mm (20 in) barrel options: the first – fitted with a fixed, post foresight (used on the standard rifle version with aperture iron sights) and the second type – equipped with a 40 mm M203 grenade launcher that can be used mounted on the standard length rifle or autonomously – as a stand alone grenade launcher after mounting a butt pad attachment to the end of the 5.56 mm barrel. microtech msar, microtech stg556, microtech small arms research, microtech knives, ultratech microtech, halo microtech, microtech knife, otf microtech, microtech switchblades, terzuola microtech, microtech combat talon, microtech mtx2, microtech makora, microtech utx70, microtech udt, scarab microtech, microtech lightfoot, aamc msar, microtech amphibian, microtech card reader, zio microtech, microtech switchblade, microtech cameramate, microtech ecu, microtech cmtx5, microtech scanners, microtech hd50, microtech automatics, microtech socom, microtech dragon slayer, microtech ut6, msar medical, microtech automatic, microtech computers, microtech blade, suss microtech, microtech geffel, microtech driver, microtech double action
The receiver housing is a steel-reinforced aluminum extrusion. The cocking lever is located at the left side and is connected with the bolt carrier’s left guide rod. A bolt hold open device locks the bolt carrier assembly back when changing magazines. Integrated with the receiver is a fixed carry handle that also contains a 1.5x telescopic sight made by Swarovski. The optic is permanently set to firing at 300 m. The rifle also has a back-up iron sight with a rear notch and front blade, located on top of the optical sight housing, used in case of primary sight failure or damage. In order to mount a wide range of optics and accessories a receiver with a NATO standard rail and detachable carry handle was developed.
The weapon’s stock, made from fiberglass-reinforced polyamide 66, has a pistol grip with an enlarged trigger guard that allows the gun to be fired with gloves.
The AUG uses the 5.56 x 45 mm NATO cartridge and will stabilize both SS109/M855 and M193 bullets.
The weapon is fully ambidextrous (after swapping out the bolt and replacing ejection port covers).
A single fire version of the rifle known as the AUG P is available to the civilian and law enforcement markets. It features a shorter (407 mm (16 in)) barrel and a bolt/carrier and trigger assembly that will only allow semiautomatic fire.
The light machine gun variant can be modified to fire from an open bolt (called the AUG LMG). To accomplish this, a modified bolt carrier, striker and trigger mechanism with sear are used.
The rifle comes standard with 4 magazines, a muzzle cap, spare bolt for left-handed shooters, blank firing adapter, cleaning kit, sling and either an American M7 or Austrian KCB bayonet.
Based on the AUG, Steyr developed the 9 mm AUG submachine gun that fires the 9 x 19 mm Parabellum pistol cartridge. It is an automatic, blowback operated model that fires from a closed bolt. Unlike the rifle variants, this SMG has a unique 420 mm (16.5 in) barrel (with 6 RH grooves at a twist of 250 mm (9.8 in)) ended with a recoil compensator, a slightly different charging handle and a magazine well conversion insert enabling the use of standard 25-round box magazines from the Steyr MPi 81 and TMP SMGs. A conversion kit used to transform any rifle variant into the submachine gun is also available. It consists of a barrel, bolt, adapter insert and magazine.
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