Full-length 20-inch A2-configuration XM15 with rifle-length gas system, A2 fixed stock, and carry handle upper. The classic full-size AR-15 profile that replicates the M16A2 ergonomics in a semi-auto civilian package. Bushmaster's direct competitor to Colt's SP1 and SP-1 Sporter. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 1992, United States Weight: 112 oz Overall length: 39.5" Status: Discontinued Intended use: Recreational Shooting, Target Shooting