The F-1 Firearms DuraBolt Gold direct impingement full auto rated M16/M4 bolt carrier groups, for use in AR15 platforms, are compatible with mil-spec receivers and associated components. The DuraBolt Gold is enhanced with a Physical Vapor Deposition (PVD) TiN coating, which gives it an extremely durable and corrosion resistant gold mirror finish. The DuraBolt Gold’s coating also offers excellent lubricity with a 0.45 coefficient of friction.
The complete DuraBolt Gold Carrier Group comes with:
- DuraBolt Gold Bolt Carrier Group
- 8620 Aircraft Quality Steel
- Chrome Lined Bolt Raceway
- DuraBolt 5.56 Bolt Assembly
- Carpenter 158® Bolt w/Spring and Ejector
- DuraBolt 17-4 Firing Pin w/Chrome Finish
- DuraBolt Cam Pin
- F-1 Firearms 100% Product Guarantee
- 5.56 BCG Weight: 11.55 oz.