CMMG MK3 308 Bolt Carrier Group


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CMMG MK3 308 Bolt Carrier Group

This complete CMMG MK3 308 Bolt Carrier Group is a drop in solution for your next AR10/308 build.  Machined from 8620 steel, the chrome lined carrier is finished in durable black phosphate.  The bolt is machined from 9310 hardened steel and features a S7 tool steel extractor.  Includes carrier, assembled bolt, stainless steel firing pin, cam pin, and firing pin retention pin.

See our entire selection of AR10 BCG here.

Product Information

Part #: 38BA423
Manufacturer:  CMMG
Model: MK3
Platform:  AR10 | 308
Finish:  Phosphate
MSRP:  $299.95

Weight 18 oz
Dimensions 9 × 2 × 2 in
Coating Type




Part Type

Bolt Carrier Group, Upper Receiver Parts



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