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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

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