New in box. CMMG Mk3 AR-10 BCG.

Complete Mk3/LR-308 .308 bolt carrier group.

Bolt: 9310 Steel, Phosphate Finish
Carrier: 8620 Steel, Chrome Lined, Phosphate Finish
Extractor: S7 Tool Steel, Phosphate Finish
All CMMG products come with a Lifetime Quality Guarantee.