Bushmaster's flagship AR-15 carbine. One of the most widely sold AR-15s of the 1990s and 2000s. The XM15-E2S was a mil-spec carbine offered at competitive pricing. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 1992, USA Weight: 128 oz Overall length: 32.5" Status: Discontinued Intended use: sport, home defense