The Steyr AUG A3 M1 with black receiver is the base configuration combining the modern Picatinny rail with traditional AUG bullpup ergonomics in a black polymer chassis. The benchmark AUG for US buyers. Type: Bullpup Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2014, Austria Weight: 7.9 oz Overall length: 27.2" Status: Active Military use: Yes Intended use: Home Defense, Tactical, Collector