10.5 inch MRP w/enhanced complete full auto bolt carrier group.
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.
*Free-floating barrel, quick change barrel
*No loss of zero from rough handling
*Reduced temperature to handguard & optics
*Increased barrel life
*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
*Accepts standard & enhanced M16-type (Stoner design) components