- CRN Coated, Silver
- Carpenter 158 bolt that is ground after heat treat
- 8620 Steel Construction
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.
|Manufacturer Part #||DB-556-CRN||Model||DuraBolt|
|Type||Bolt Carrier Group||Color||Silver|
|Subcategory||Bolts & Bolt Carrier Groups||Finish||Chrome Nitride|