Colt's Manufacturing M4 Carbine. Knights Armament Rail System. Extended flash hider has been pinned and welded to achieve a non-NFA length of 16.1". Includes the side sling swivel at the gas block and 5 Magazines, Tango Down Stubby Fore Grip and Original Fore Grip, BCM Grip And Original M4 Grip, Matech Rear Flip-Up Sight, Magpul Sling, Magpul Stock And Original Stock, As well As a Very Nice Savior Range Bag.