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Upper Group, Mk4 T, 5.56mm, SBN

5.00 LBS
Calculated at checkout

Product Description

The Mk4 T Upper Group introduces CMMG’s RKM series of KeyMod free float hand guards. Either a 416 stainless or nitrided 4140 CrMo steel barrel in a medium taper profile are offered for both 5.56mm and 300 BLK. The 22LR and 9mm models feature a nitrided 4140 CrMo M4 profile barrel.


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

Upper Group consists of:
     Upper Receiver Assembly (Upper Receiver, Ejection Port Cover, Forward Assist)
     Barrel Sub-Assembly
     Hand Guard and Barrel Nut
     Charging Handle
     Bolt Carrier Group

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