The Bushmaster ACR Enhanced added an upgraded trigger, enhanced handguard, and improved ergonomic features over the base ACR, addressing some of the criticisms of the standard model. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2011, USA Weight: 8.3 oz Overall length: 36.5" Status: Discontinued Intended use: Tactical, Competition