CMMG Mk4 T 22LR Upper Group BLACK with two port compensator not flash hider.
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. For best performance use a round style hammer as notched hammers can cause function issues and 36 grain plated nose bullets have proven to be the best choice for function.
Caliber: 22 long rifle
Barrel: 16, 1:16 twist, M4 profile, 4140 CM, SBN
Muzzle: A2 comp., threaded 1/2-28
Hand Guard: CMMG RKM11 KeyMod hand guard
Receiver: Forged 7075-T6 AL M4 type upper
Upper Group consists of:
Upper Receiver Assembly (Upper Receiver, Ejection Port Cover, Forward Assist, Gas Deflector)
Hand Guard and Barrel Nut
Bolt Carrier Group