Upper Receiver

LBE Unlimited Castle Nut AR15 Castle Nut 4140 Steel Mag Phosphate Finish MADE IN THE USA

MRP-L MLOK 11.5" "SHOVELNOSE" UPPER LMT DEFENSE Available as an stand alone item for the first time upgrade your existing LMT piston gun to the “SHOVELNOSE” The “Shovelnose” MRP upper was designed specifically for shooters who...

MRP-L MLOK 9.25" UPPER LMT DEFENSE The patented LMT Monolithic Rail Platform, MRP™ upper receiver. The receiver and handguard are made from a single piece of forged aerospace aluminum. The barrel is held in place with a proprietary locking system...