F-1 Firearms DuraBolt TTZ Carrier 5.56NATO

F-1 Firearms Durabolt carrier group (BCG) is full auto-rated and is available in 5.56 NATO, 7.62 NATO and 9MM. The 5.56 NATO M16/M4 bolt carrier groups are compatible with MIL-SPEC receivers and associated components. PVD coated in-house to provide the hardest, smoothest, and most wear-resistant coating available which creates an extremely durable corrosion resistant surface with un-comparable lubricity.

Bolt Carrier Group Information:

• 8620 high-grade steel
• Chrome-lined interior
• Carpenter 158 bolt with spring and ejector
• 17-4 firing pin
• Full auto-rated
• Durabolt cam pin