The LMT MRP-L M-LOK 13.25-inch upper receiver is the rifle-length member of the MRP-L line, designed for barrels from 14.5 up to 20 inches (LMT part no. R-L7Y1A). The receiver and handguard are made from one piece of aerospace-grade aluminum, and M-LOK compatible attachment points cover all eight sides of the handguard. Four QD sling swivel locations make it simple to set up a sling. Two locking bolts reached from the right side hold the barrel, so a standard T-30 Torx bit is the only tool needed. It is sold without a barrel.

Key Specifications

• Barrel compatibility is 14.5 to 20 inches, which makes it the rifle-length option in the MRP-L line.
• Caliber compatibility is 5.56×45 and .300 BLK, with a matching LMT barrel.
• The handguard has M-LOK attachment points on all eight sides, which leaves room for lights, lasers and grips.
• Four QD sling swivel attachment points give several sling positions.
• The receiver and handguard are one piece of aerospace-grade aluminum, held to the barrel by two bolts and a T-30 Torx bit.

Frequently Asked Questions

What barrel lengths does it fit? LMT designed it for barrels from 14.5 up to 20 inches.

Is a barrel included? No. It is sold without a barrel and requires the LMT monolithic barrel assembly, which has a low-profile gas block with a straight gas tube.

How many sling attachment points does it have? It has four QD sling swivel attachment locations.

Buy the LMT MRP-L M-LOK 13.25-Inch Rifle-Length Upper Receiver

Rifle-length barrels, M-LOK all around and quick barrel changes make this a solid base for a precision-minded AR-15. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more AR-15 accessories and parts while you are here.