CMMG Bolt Carrier Group Parts Kit AR-15 is the next parts kit you need. The CMMG AR-15 Bolt Rehab. kit includes firing pin, firing pin retaining pin, 3 gas rings, extractor o ring, extractor pin, extractor, bolt carrier retaining pin, extractor retaining pin. Perfect for maintaining your bolt carrier group. All parts meet or exceed mil-spec. CMMG Bolt Carrier Group Parts Kit AR-15 is a remarkable piece of equipment.
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