BCM AR pistol with 11.5-inch barrel and carbine-length gas system. KMR-A KeyMod rail. Requires SBR tax stamp or pistol brace to be Title I. Type: Pistol Action: Semi-automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2014, USA Weight: 60 oz Status: Active Intended use: Home Defense/SBR