7.5" 5.56 NATO QpQ Nitride 1:7 Twist Barrel

7.5" 5.56 NATO QpQ Nitride 1:7 Twist BarrelFeatures 5.56 NATO 7.5" 1:7 Twist QpQ Nitride Treated Pistol Length Gas System M4 Profile and Feed Ramps 1/2 by 28 Threads Proudly Made In The U.S.A Lifetime WarrantyAll NFA/ATF Rules ApplyYou may use this AR-15 barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a non-NFA lower receiver is prohibited, except when installed on a Pistol configuration firearm.