Diamondback Barrels, 223 Remington/556NATO, 10", 1:8 Twist, Black Nitride Finish, Carbine Length Gas System, Threaded 1/2-28" 556C10M50B8R Available to order on-line. Ships in 5-14 days $76.88
Diamondback Medium Profile Barrel, 556NATO, 10.5", 1:9 Twist, Carbine Length Gas System, Nitride Finish, Black 556C10M50B9-R Available to order on-line. Ships in 5-14 days $76.88