FailZero, AR9. 9MM Bolt Carrier Group, Nickel Boron
- • FZ 9MM BCG is compatible with both Glock and Colt style magazines.
- • 8620 heat treated (same as Mil-Spec) AR Carrier
- • EXO Nickel Boron Technology Coating
- • Staked carrier guide (gas key)
- • 5.56 Extractor
- • Chrome Firing Pin
