You may use this 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.
- Material: 4150 Chrome Moly Vanadium
- Profile: DRP or Government
- Finish: Black Phosphate
- Gas Block Journal: .750" or .625"
- Twist Rate: 1:7 inches
- Muzzle: 1/2x28 Threaded
Big Book Catalog, Issue:73, Page:026