Colt M4 Midlength Carbine CR6960 chambered in 5.56NATO. Features a 16" chrome lined barrel with 1:7" twist. Other features include a 6 position collapsible stock, mid length gas system and a MLOK forearm with plenty of room for your favorite accessories and optic. Capacity is 30 rounds and comes with 1- 30 round magazine. This make a great home defense rifle with a smooth shooting mid length gas system.