Sport Rifle Carbine by the founders of the original Bushmaster plant. A straightforward 16-inch M4-pattern build with M4 handguards. Type: Carbine Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2012, USA Weight: 112 oz Overall length: 32" Status: Active Intended use: Sport Shooting, Home Defense