FN's baseline civilian AR-15 built to military specifications by the original M16 manufacturer. 16-inch mid-length gas with chrome-lined bore. Type: Carbine Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2014, USA Weight: 112 oz Overall length: 32" Status: Active Intended use: Law Enforcement, Sport Shooting, Home Defense