F-1 Firearms Durabolt DB-556-CRN, Bolt Carrier Group Assembly, .223 Remington/556NATO, Chrome Nitride Finish, Silver

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.

CRN Coated, Silver

Carpenter 158 bolt that is ground after heat treat

8620 Steel Construction

Finish: Chrome Nitride
Manufacturer: F-1 Firearms
Manufacturers Part Number: DB-556-CRN
Model: DuraBolt
Type: Bolt Carrier Group
Sub Category: Bolts & Bolt Carrier Groups
Color: Silver

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