The BCM CQB (Close Quarters Battle) 11.5-inch is the most compact direct-impingement AR in BCM's lineup. The cold hammer-forged chrome-lined 11.5-inch barrel with BCM's optimized carbine gas system delivers reliable function at a length that challenges many DI designs. Used by some law enforcement special operations units as a designated CQB carbine or pistol-configuration entry tool. Type: Pistol Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2011, USA Weight: 62 oz Overall length: 24.5" Status: Active Intended use: Home Defense, Duty Use, Suppressor Host