This complete kit will convert any MIL-SPEC AR-15/M4 Lower into the top-performing MCX-SPEAR LT.

    Included items:

    • Complete 9" 5.56 NATO upper assembly includes our removable 3-prong flash-hider ready to accept our SLH & SLX suppressor systems.
    • Receiver extension delete stock adapter so you may mount any folding or static stock or brace which uses a vertical 1913 rail system.

    NFA DISCLAIMER/WARNING:Upper receiver does not meet the 16" minimum barrel length requirement, and requires registration and a tax stamp with the Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE) when assembled into a complete rifle. Additional state and local restrictions may apply. It is the sole responsibility of the buyer to comply with any and all applicable laws.


    Retail: $1,999.00
    Price: $1,749.00
    You Save: $250.00 (12.5%)
    Availability: Out Of Stock / Not Available For Back Orders
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    Thread pitch 5/8 in - 24
    Compatible with the following lowers: MCX, M400, 516, and any MIL-SPEC AR-15/M4.
    Model SIG MCX LT
    Barrel Length  9"
    Caliber 5.56 NATO