LMT MRP Rifle Length AR-15 Quad Rail Upper Receiver
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Lewis Machine & Tool
Overview
The LMT MRP Rifle Length AR-15 Quad Rail Upper Receiver is a stripped upper designed for builders looking to customize their AR-15 platform. It features a rifle-length gas system, which provides smoother cycling and improved reliability, making it ideal for longer barrel setups. This upper receiver type follows the A4 configuration, providing a solid foundation for various optics and accessories, often seen in precision or tactical builds.
Specifications
Build history on GunPartPicker
Builders have been adding the LMT MRP Rifle Length AR-15 Quad Rail Upper Receiver to their builds on GunPartPicker since March 2026. All time, it ranks #620 of the 1,654 upper receivers builders have added.
It was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $849 at AR15 Discounts for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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