CMMG MK3 Firing Pin Retainer – AR-10/LR-308 Pattern Rifles

The CMMG MK3 Firing Pin Retainer is a replacement component for AR-10 and LR-308 pattern rifles, specifically designed for CMMG MK3 bolt carrier groups. This small but critical part secures the firing pin within the bolt carrier, preventing it from walking out during cycling. Replacing a worn or damaged retainer restores reliable function and prevents potential malfunctions caused by firing pin migration.

Manufactured to CMMG's specifications for their MK3 platform, this retainer is made from durable steel with a corrosion-resistant finish. Installation requires disassembly of the bolt carrier group and proper alignment of the retaining pin—straightforward for those familiar with AR maintenance, though care must be taken to avoid damaging the bolt carrier or firing pin during installation.

• Part Type: Firing Pin Retainer
• Compatible Firearms: CMMG MK3, AR-10/LR-308 Pattern Rifles
• Material: Steel
• Finish: Corrosion-Resistant
• Installation: Drop-In (Requires BCG Disassembly)
• Includes: (1) Firing Pin Retainer