The F-1 Firearms DuraBolt direct impingement full auto rated M16/M4 bolt carrier group, for use in AR15 platforms, is compatible with MIL-SPEC receivers and associated components. The DuraBolt is enhanced with a Physical Vapor Deposition (PVD) coating, which gives it an extremely durable and corrosion resistant silver mirror finish. The DuraBolt coating also offers excellent lubricity with a low coefficient of friction.
- Carpenter 158 bolt, ground after heat treat, MPI and HPT
- 9310 steel carrier, ground after heat treat
- Due to current demand, please allow up to 30 days for shipment
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