The Steyr AUG A3 SA is the optic-less version of the A3 M1 — shipped without any optic on the Picatinny rail, allowing the owner to mount their own preferred sight system from the start. The SA (Sight Available) designation distinguishes it from the A3 M1 which ships with factory sight options. Functionally identical in action, barrel length, and magazine compatibility to the M1. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2013, Austria Weight: 90.4 oz Overall length: 28.15" Status: Active Military use: Yes Intended use: military, sporting, tactical