Colt's lightweight semi-auto carbine with 16-inch chrome-lined barrel and M4 profile. Commercial-market version of the M4 with a 6-position stock. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2010, USA Weight: 6.9 oz Overall length: 35.5" Status: Active Intended use: Service, Home Defense, Range