The CMMG Mk3 Firing Pin (CMMG part no. 38BA4D3) is a direct-fit replacement firing pin built for the CMMG Mk3 platform. It’s a small but essential part of the bolt carrier group, and having a spare on hand or swapping in a fresh one is a simple way to keep a Mk3-pattern rifle running reliably. CMMG builds this pin to factory specifications for a drop-in fit with no additional machining required.

Key Specifications

• Built specifically for the CMMG Mk3 platform.
• Functions as a direct-fit replacement firing pin within the bolt carrier group.

Frequently Asked Questions

What platform does this firing pin fit? The CMMG Mk3.

Is this a drop-in replacement part? Yes, it’s built to factory specifications for the Mk3 bolt carrier group.

Buy the CMMG Mk3 Firing Pin

Keeping a spare firing pin on hand is cheap insurance for any Mk3 owner, and this CMMG factory-spec part fits right in. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse our other gun accessories and parts.