The Steyr AUG is a bullpup assault rifle that placed the action behind the trigger group, allowing a full 20-inch barrel in a package only 31 inches overall. Adopted by Austria, Australia, and numerous other nations, its integrated optical sight and modular design were revolutionary. The AUG was the first widely adopted bullpup military rifle. Type: Rifle Action: Semi-Automatic/Full-Auto Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 1977, Austria Weight: 7.9 oz Overall length: 31.1" Status: Active Military use: Yes Intended use: Military, Law Enforcement