DDM4 v7S Complete Upper Receiver 5.56mm NATO 11.5 Inch Barrel With LPG MRF XS 10.0 Rail - All NFA Rules Apply Available to order on-line. Ships in 5-14 days $1,214.00
DD Barrel, Light Weight, 556NATO, 14.5", 1:7 Twist, Mid Length Gas System, Black 07-078-08072-018 Available to order on-line. Ships in 5-14 days $338.00
Spike's Tactical Barrel, 556NATO, 11.5" Hammer Forged Barrel, 1:7 Twist, Fits AR Rifles, 1/2x28 TPI Thread, Black Finish SB51106-LW Available to order on-line. Ships in 5-14 days $318.00
DD MK12 Upper Receiver Group 5.56mm NATO 18 Inch MK12 Profile Barrel with Salt Bath Nitride Finish Available to order on-line. Ships in 5-14 days $1,554.00