LMT Defense MRP-L M-Lok 7.25" PDW Length Stripped Upper Receiver

The LMT Defense MRP-L M-Lok 7.25" PDW Length stripped upper receiver is a compact, monolithic masterpiece engineered for ultra-short AR-15/PDW configurations, ideal for suppressed .300 Blackout builds, compact 5.56 setups, or specialized tactical applications. CNC-machined from a single piece of forged aerospace-grade 7075-T6 aluminum, this stripped upper integrates the receiver and handguard into one rigid unit, eliminating flex and point-of-impact shifts for optics or accessories mounted directly to the M-Lok slots. The ultra-short 7.25-inch PDW-length design optimizes maneuverability in close-quarters scenarios while supporting direct impingement barrels typically from 8" to 9" (or slightly longer in some configurations), with the proprietary quick-change barrel system allowing swaps in minutes using just a T-30 Torx bit and torque wrench—maintaining zero without the need for cantilever mounts.

This monolithic rail platform (MRP-L) upper features M-Lok attachment points for lightweight, versatile accessory mounting across multiple sides, a continuous top Picatinny rail for optics, and exceptional durability proven in demanding environments. As a stripped upper, it requires a compatible MRP barrel, BCG, charging handle, and lower receiver to complete the build, making it perfect for custom PDW, SBR, or multi-caliber projects where compactness and modularity are paramount. Originally developed with input for an international customer, it delivers LMT's signature precision fit, flawless reliability, and battle-proven performance in a package designed for professionals seeking the most compact monolithic solutions available.

Whether building a suppressed .300 BLK PDW for home defense, a ultra-short 5.56 system for tactical entry, or a versatile platform for dynamic shooting, the L7NX1A combines innovative design with unmatched rigidity and ease of maintenance. Its stripped format offers builders maximum customization while upholding LMT Defense's reputation for components that withstand extreme abuse and deliver consistent accuracy.

Forge your most compact AR-15 platform with the LMT Defense MRP-L M-Lok 7.25" PDW Length stripped upper receiver —shop this elite monolithic component now and add it to your build at Battlehawk Armory.