Troy Defense A3 with 16-inch chrome-lined barrel and A-frame front sight post in a fixed-front-sight configuration. The A3 preserves the A3 upper receiver configuration with M4 handguard for users preferring the traditional AR-15 control layout with updated internals. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2009, USA Weight: 100 oz Overall length: 32.5" Status: Active Intended use: Tactical, Law Enforcement, Sport Shooting