The FailZero M16 Full Auto Bolt Carrier Group Nitride comes fully assembled and ready to drop into any mil spec M16, M4 or AR15 upper receivers. 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.
Black Nitride treated parts include:
Firing Pin has a chrome finish.
Black Nitride treated parts include:
- Bolt & Extractor (5.56/.223 compatible)
- Bolt Carrier
- Extractor
- Cam Pin
- Carrier Key
Firing Pin has a chrome finish.
