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This 22LR Mk4 T Upper Group introduces CMMG’s RKM series of KeyMod free float hand guards. It also features a nitrided 4140 CrMo M4 profile barrel.
- 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)
- Barrel Sub-Assembly
- Hand Guard and Barrel Nut
- Charging Handle
- Bolt Carrier Group