Free-Float forend SRC with quad-rail handguard and 16-inch chrome-lined barrel. Windham's upgraded patrol carbine package. Type: Carbine Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2013, USA Weight: 112 oz Overall length: 32" Status: Active Intended use: Sport Shooting, Law Enforcement, Home Defense