Rainier Arms

Quick Links

Browse by:

Browse by:

Informative Links

Payment Methods

  • VisaMaster CardCheck / Money OrderDiscover Card

You are here: Home | Browse | Lewis Machine Tool - LMT | Detail

Product Detail

Upper: LMT MRP CQB 16 Upper - Piston (LDS)

Click to zoom!
List Price: $1558.34
On Sale: $1558.33
You Save: $0.01

Product Information

Rainier Arms Labor Day Sale. Please use COUPON CODE 0901 to see your final price at check out!


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 for cleaner, more reliable operation
  • Free-floating barrel
  • No loss of zero from rough handling
  • Reduced temperature to handguard & optics
  • Increased barrel life
  • Easy-to-access/clean design
  • Straight gas tube resists bending and retains better alignment with gas key
  • Quad Mil-Std 1913 rails
  • Top rail position matches M4 & E3-type weapons ensuring optics and sight compatibility
  • Accepts standard & enhanced M16-type (Stoner design) components


  • Complete Factory LMT 16" MRP CQB Piston-Driven Upper
  • MPI Tested barrel & bolt
  • Factory Test Fired
  • USGI 1:7 Twist
  • Chrome Bore & Chamber
  • T-markings (RAS type)
  • M4 feed ramps
  • Torque wrench, 3 Rail Panels Included

Additional Images

Additional Image 1 Additional Image 2 Additional Image 3

Please: Login | Register

Related Products

Rifle: LMT MRP CQB 16 Rifle - Piston

Upper: Noveske 5.56MM Recce - 16 LP