This classic US military reproduction closely replicates the markings and configuration of the M4A1 Socom Carbine. The lower receiver features property of the US govt, M4A1 carbine, and CAL. 5.56 mm. The barrel is a true Socom 14.5 heavy barrel with the iconic M203 flats under the knights armament rail system. Extended flash hider has been pinned and welded to achieve a non-NFA length of 16.1 inches. Includes the side sling swivel at the gas block and an ambidextrous safety selector. This reproduction is sure to turn heads. Features: Features KAC RAS rail