The Colt M4 Carbine delivers exceptional performance, reliability, and precision that Colt is known for. It comes chambered in 5.56 NATO with a 16.1 inch barrel. Features include a 4 position stock, a Magpul rear sight, and a 30 round magazine. Buy guns online from the best online gun store and get this Colt AR15 or other AR-15s for sale from us  today!