This is a used Colt SP1 AR-15 rifle chambered in 223/556. It features a 16-inch barrel with a 1:9 twist rate, carry handle, adjustable stock, and a 20-round magazine. The twist rate for this rifle will be optimal for 55-62 grain ammunition. This Colt is in excellent condition and ready to meet your tactical demands. Additional uses for this rifle include target shooting/plinking, home defense, small game hunting, and various other tactical uses. Buy online today!