BCM Jack carbine with 14.5-inch barrel, extended free-float rail, and new enhanced BCM lower. Named after Jack, a BCM team member. Mil-spec throughout. Type: Rifle Action: Semi-automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2019, USA Weight: 62.5 oz Overall length: 31.5" Status: Active Intended use: Duty/Patrol