The FailZero AR9 9mm Bolt Carrier Group Nitride comes fully assembled and ready to drop into most 9mm AR platform rifles and pistols. The Black Nitride treatment hardens the metal for great corrosion protection and wear resistance and has an additional benefit of making it easy to clean.
- 9MM BCG is compatible with both Glock and Colt style magazines
- 8620 heat treated (same as Mil-Spec) AR Carrier
- Black Nitride Finish (Salt Bath Nitride)
- Staked carrier guide (gas key)
- Chrome Firing Pin
- 5.56 Extractor