This is a used Colt M4 AR-15 Carbine chambered in 5.56 NATO. It features a 16-inch barrel with a 1/7 twist, 30-round magazine, A2 front sight post, Magpul rear sight, and Magpul furniture. Overall, this Colt is in good condition with normal handling wear on the barrel, receiver, and handguard. Bore condition is good with crisp rifling. This would be a good choice for home defense. Buy online today!