- Medium taper profile stainless steel barrel
- 5/8"-24 threaded A2 compensator
- CMMG RKM15 Handguard
- Billet 7075-T6 AL LR308 Receiver
The Mk3 is the perfect Upper Group for the tree stand or target range. The Mk3 utilizes an 20″ 416 stainless steel medium taper barrel, and CMMG’s RKM15 KeyMod hand guard. Each Upper Group is covered by CMMG’s lifetime quality guarantee.