| LMT MRP Upper Receiver w/ 14.5 Inch Chrome Lined 1:7 Twist 5.56mm Barrel - M-5-4C7-XX-XX-X-XXX Lewis Machine and Tool MRP™ and CQB MRP™ Upper Receiver Assemblies Include: Does NOT include bolt carrier Group MRP = Monolithic Rail Platform CQB = Close Quarter Combat All NFA Rules Apply |