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    The iconic Mk4LE Upper Group in 9mm Luger. Features a nitrided 16.1″ 4140 CrMo steel barrel in a M4 profile, which includes a “F” marked front sight base.

    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


    • Caliber: 9mm
    • Barrel: 16.1″, 1:10 twist, M4 profile, 4140CM, SBN
    • Muzzle: A2 comp., threaded 1/2-36
    • Hand Guard: M4 type 2-piece hand guards
    • Receivers: Forged 7075-T6 AL M4 type upper

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