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!
Benefits:
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.
