BCM's foundational AR-15 pattern rifle with 16-inch carbine-length chrome-lined barrel, M4 feed ramps, and standard A2 flash hider. The BCM4 Standard is the entry point to the BCM line and represents the company's interpretation of a properly built mil-spec carbine. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2005, USA Weight: 96 oz Overall length: 32.5" Status: Active Intended use: Tactical, Sport Shooting, Home Defense