The patented LMT Monolithic Rail Platform (MRP) upper receiver is the only AR-15 upper that incorporates the handguard and receiver as one component.

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The patented LMT Monolithic Rail Platform (MRP) upper receiver is the only AR-15 upper that incorporates the handguard and receiver as one component. This state-of-the-art design is CNC machined from a single piece of forged aerospace aluminum and its design, benefits, and functionality is unmatched in the industry.

LMT MRP-L LM8 AR-15 Upper Receiver Assembly7.25" is good start for your next LMT piston barrel build or as an upgrade to your existing LMT rifle. This AR-15 Upper provides a generous amount of space on the monolithic rail and on the free-float handguard.

At 16” in length, this LMT barrel has a carbine length gas system and a 1/7 twist rate. The bore is chrome lined for long lasting durability and the outside diameter is Phosphate finished. This barreled LMT Upper Receiver is a reliable foundation for building a high-quality AR-15.

The patented LMT Monolithic Rail Platform, MRP™ upper receiver. This is a 11.5″ LMT Specwar upper receiver chassis and a LMT MRP 12.5″ Specwar barrel. The receiver and handguard are made from a single piece of aerospace grade aluminum.

$ 888.00 – $ 932.00 Select options This product has multiple variants. The options may be chosen on the product page.

The patented LMT monolithic rail platform (MRP) upper receiver, has a receiver and handguard that are made from a single piece of aerospace grade aluminum. The barrel is held in place with a proprietary locking system that utilizes two locking bolts accessible from the …

LMT Shovelnose MRP-L M-LOK Upper Receiver 11.5″ is good start for your next LMT piston barrel build or as an upgrade to your existing LMT rifle. This AR-15 Upper provides a generous amount of space on the monolithic rail and on the free-float handguard.

The patented LMT Monolithic Rail Platform (MRP) upper receiver is the only AR-15 upper that incorporates the handguard and receiver as one component.