Upper Mk4 T 5.56mm Sbn
Upper MK4 T 5.56mm SBN
When modularity, affordability, and quality are all important the Mk4 T is the rifle of choice. The Mk4 T introduces CMMG’s RKM series of KeyMod free float hand guards. Nitrided 4140 CrMo steel barrel in a medium taper profile.
Decription:
- Caliber: 5.56mm
- Barrel: 16? medium weight taper profile*
- Muzzle: A2 comp., threaded 1/2-28
- Hand Guard: CMMG RKM11 KeyMod hand guard
- Receiver: Forged 7075-T6 AL M4 type
