The CR6720 is the commercial-channel equivalent of the Colt 6720, a 16-inch mid-length gas system AR-15. The mid-length gas system reduces felt recoil compared to carbine-length systems and reduces the operational temperature of the bolt carrier group under sustained fire. Features the same chrome-lined barrel and mil-spec components as other Colt CR-series rifles. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2010, USA Weight: 6.36 oz Overall length: 32.5" Status: Discontinued Intended use: Sport Shooting