LMT MLC Rifle Length AR-15 M-LOK Upper Receiver

Manufactured by Lewis Machine & Tool
Manufactured by Lewis Machine & Tool
1 Review

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NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



This receiver is the starting point for your LMT MRP build. Think of it as a blank canvas—or a swiss army knife.

  • MRP Receiver with 14.5+” Intermediate Barrel Compatibility
  • 5 QD Sling attachment Points
  • Precision Machined Receiver with MLOK handguard
  • True Monolithic Top Rail
  • Forward Assist
  • A2 Flash Hider
  • Black Finish

The LMT L7Y1A MRP Receiver is a bare monolithic MLOK upper receiver that fits intermediate-caliber cartridges with barrels larger than 14.5”. By adding your own LMT barrels, you can transform this receiver from a combat carbine to a full length SPR in under a minute. You can also transition to .300blk or .224 Valkyrie just as easily. With the LMT MRP receiver, you have the power to configure your rifle exactly how you need it without buying multiple guns.

This full-size MRP receiver is one of three available sizes: MRP CQB, full-size MRP, and MWS. CQB receivers have a short handguard that fits barrels between 10.5” and 18”. The full-size MRP receiver uses the same cartridges as the CQB receiver but has a larger handguard for rifle-length gas systems and 14.5” or longer barrels. Finally, the MWS is the .308 full-power equivalent. With a wide range of available calibers, the MWS makes a great hunting rifle, battle rifle, or DMR—and transition between them with simple barrel changes.

This receiver also has a monolithic top rail for fully variable optics mounting, 5 available QD points, a forward assist, and incredible precision machining. Overall, the LMT MRP receiver is a fantastic place to start an AR build, especially when you want that barrel changing ability and smooth-shooting rifle-length gas system. This version uses an MLOK handguard for accessory attachment, but Quad-Rail and Slick receivers are also available.
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AssemblyAssembled Uppers
BrandLewis Machine & Tool
Feed RampsM4
FinishHardcoat Anodized
Forward AssistAssembled with Forward Assist
Port DoorAssembled with Port Cover
Receiver Material7075-T6 Aluminum
T MarksT-Marked

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

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Atlas shrugged

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LMT products are great, but my receiver shipped with multiple blemishes. Very disappointing for a nearly $800 receiver.