Austeyr

Steyr AUG
Steyr AUG A1 with 508 mm (20.0 in) barrel
Type	Bullpup assault rifle Carbine Light machine gun Squad Automatic Weapon Submachine gun
Place of origin	Austria
Service history
In service	1978–present
Used by	See Users
Wars	See Conflicts
Production history
Designer	Horst Wesp Karl Wagner Karl Möse
Designed	1977
Manufacturer	Steyr Mannlicher Thales Australia, Lithgow Facility SME Ordnance
Produced	1978–present (Standard) 1988–present (Para) 2004–present (A3) 2007–present (A3 SF)
Variants	See Variants
Specifications
Weight	3.6 kg (7.9 lb) (Standard) 3.3 kg (7.3 lb) (Carbine) 3.2 kg (7.1 lb) (Subcarbine) 3.9 kg (8.6 lb) (HBAR) 3.3 kg (7.3 lb) (Para)
Length	790 mm (31.1 in) (Standard) 690 mm (27.2 in) (Carbine) 630 mm (24.8 in) (Subcarbine) 900 mm (35.4 in) (HBAR) 665 mm (26.2 in) (Para)
Barrel length	508 mm (20.0 in) (Standard) 407 mm (16.0 in) (Carbine) 350 mm (13.8 in) (Subcarbine) 621 mm (24.4 in) (HBAR) 420 mm (16.5 in) (Para)

Cartridge	5.56×45mm NATO 9×19mm Parabellum
Action	Gas-operated, rotating bolt
Rate of fire	680–750 RPM
Muzzle velocity	Standard rifle: 970 m/s (3,182 ft/s)
Effective firing range	300 metres (980 ft)
Maximum firing range	2,700 metres (8,900 ft)
Feed system	5.56×45mm NATO: 30-, 42-round detachable box magazine, 9×19mm Parabellum: 25-, 32-round detachable MPi 69 box magazine
Sights	Swarovski 1.5× telescopic sight, emergency battle sights, and Picatinny rail for various optics

The Steyr AUG is an Austrian 5.56×45mm NATO bullpup assault rifle, designed in the 1960s 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 (Sturmgewehr 77) in 1978, where it replaced the 7.62×51mm StG 58 automatic rifle (a licence-built FN FAL). In production since 1978, it is the standard small arm of the Austrian Bundesheer and various national police units.

The AUG and its variants have also been adopted by the armed forces of Argentina, Australia, Bolivia, Ecuador, Ireland, Luxembourg, Malaysia, New Zealand, Oman, Saudi Arabia, Tunisia, Pakistan, the Falkland Islands Defence Force, and the U.S. Immigration and Customs Enforcement.

The Steyr AUG is a bullpup 5.56×45mm NATO automatic rifle. It is a selective-fire weapon with a conventional gas-piston-operated action that fires from a closed bolt. It is designed as a family of rifles that could be quickly adapted to a wide variety of roles with the change of the barrel to a desired length and profile.

The AUG is a modular configuration rifle that employs a high level of polymer and advanced alloy components. It is chambered in 5.56×45mm NATO cartridge and has the standard 1:9 rifling twist that will stabilize both SS109/M855 and M193 rounds. Some nations including Australia and New Zealand uses a version with a 1:7 twist optimized for the SS109 NATO round.

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