Direct impingement AR-15 with a 16-inch chrome-lined barrel and Troy Battle Rail free-float handguard. Troy BUIS front and rear sights included. Designed as a complete duty rifle with Troy Defense proprietary components throughout. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2012, USA Weight: 7 oz Overall length: 35" Status: Active Intended use: Patrol / Range