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Unfortunately, the following product is currently unavailable through Rainier Arms.
F-1 Firearms 5.56 DuraBolt Bolt Carrier Group (BCG)
Bolt Carrier Group
The F-1 Firearms DuraBolt Black Nitride 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 bolt carrier and bolt are ground after heat treat to ensure tolerances.
- Carpenter 158 bolt, ground after heat treat, MPI and HPT
- 8620 steel carrier, ground after heat treat
| SKU | DB-556-1 |
|---|---|
| Product Type | Bolt Carrier Group |
| Manufacturer | F-1 Firearms |
| Caliber | 5.56 NATO |
