CMMG MK3 Bolt Carrier Group for 308 Win – 8620 Carrier, 9310 Bolt, Black Finish (38BA423)

• Bolt carrier group designed for MK3 rifles chambered in 308 Winchester
• Includes 8620 steel carrier for strength and long term durability
• 9310 steel bolt provides reliable performance under repeated firing conditions
• Phosphate finish enhances corrosion resistance and wear protection
• Complete bolt carrier group assembly for direct installation into compatible rifles
• Engineered for reliable cycling and consistent firearm operation

The CMMG MK3 Bolt Carrier Group 308 Win Black is a bolt carrier group designed for AR-style rifles chambered in .308 Winchester. This bolt carrier group is configured for MK3 platform rifles and serves as a complete internal cycling component. It is designed to operate within compatible upper receiver assemblies for standard firing cycles.

The CMMG MK3 bolt carrier group includes a carrier made from 8620 steel and a bolt constructed from 9310 steel. It features a phosphate finish and is supplied as a complete assembly. This product is categorized under bolt carrier groups for long gun platforms. It is used for replacing or assembling internal rifle components for range use or field configurations. In normal operation, the bolt carrier group cycles within the upper receiver to chamber and extract cartridges during firing sequences.