Civilian semi-automatic version of the M16A2 with A2 furniture and 20-inch barrel. The definitive Cold War-era service rifle configuration. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 1982, USA Weight: 128 oz Overall length: 39.6" Status: Active Intended use: Sport Shooting, Collecting