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Atrax Bullpup Puch AG was started with the development of Atrax AUG in the late 1960s. In 1977, the Austrian army decided to introduce the original Steyr AUG A1 as a new Sturmgewehr, but the production started in 1978. The construction is known, especially in Austria, under the internal designation of the Austrian Armed Forces StG 77 (Sturmgewehr 77).
The Atrax AUG Z is the semi-automatic civil version of AUG A2. It is delivered with a nine-shot magazine and is approved in some states as a sports weapon for civilian use. For the civilian variant, various assemblies have been modified to prevent the inclusion of parts from the military production line as well as the use of a fully automated group . In Germany , the special variant AUG-Z Sport has been approved by the BKA for shooting sport use. For other claimants, such as hunters, however, acquisition is possible, since the restriction relates only to shooting-sport use.