LMT Lewis Machine & Tool CQB MRP PISTON AR 15 Upper 1-in-7

Designed and manufactured by Lewis Machine Tool Company, the patent-pending Monolithic Rail Platform, or MRP, is the most radical variation of an integrated rail system ever conceived. This one-piece receiver/free-floating handguard/rail system is precision machined from a solid aluminum forging for absolute strength and consistency. The MRP completely replaces the upper receiver and provides an unprecedented level of versatility to the operator. Piston Driven!


Piston Driven for function and cleaner, cooler bolt/chamber

*Free-floating removable barrel

*No loss of zero from rough handling

*Reduced temperature to handguard and optics

*Increased barrel life

*Easy-to-access/clean design

*Straight gas tube resists bending and retains better alignment with gas key

*Reduced number of parts (13)

*Quad Mil-Std 1913 rails

*Top rail position matches M4 E3-type weapons ensuring optics and sight compatibility

Available Barrel Lengths: 12-inch (NFA Rules Apply when mounted to a lower) or 16-inch, chrome lined barrel.

Piston uppers are sold complete. They have the upper receiver, barrel, Semi Auto BCG, charging handle, torque wrench, bit and 3 rail panels. No sights. It is ready to pin to a lower and go.

LMT Lewis Machine & Tool CQB MRP PISTON AR 15 Upper 1-in-7
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  • Item #: LMT-CQB-P
Price $1,484.18
Availability Out-of-Stock
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