M4-pattern civilian carbine with 16-inch chrome-lined barrel, M4 handguards, flat-top upper, and Magpul-compatible features. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2009, USA Weight: 6.9 oz Overall length: 32.5" Status: Active Intended use: Sporting, Service, Tactical