F-1 Durabolt Ttz 5.56 Nato Silver

The F-1 Firearms DuraBolt Black Nitride direct impingement M16 Style 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.

Features :

• CRN Coated, Silver
• Carpenter 158 bolt that is ground after heat treat
• 8620 Steel Construction