LMT Monolithic Upper Receiver - AR-10 - MRP-L - M-LOK - Rifle - 12.5"
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Lewis Machine & Tool
Overview
The LMT Monolithic Upper Receiver for the AR-10 platform features a complete assembly with a 12.5-inch barrel, offering a compact and robust setup ideal for various applications. The monolithic design provides enhanced rigidity and improved alignment for better accuracy, while the M-LOK attachment system allows for versatile accessory mounting. This upper receiver is commonly found in builds chambered in .223 Wylde, making it a solid choice for builders looking to maximize performance and compatibility.
Specifications
LMT Monolithic Upper Receiver - AR-10 - MRP-L - M-LOK - Rifle - 12.5"
August 2026 on GunPartPicker
LMT Monolithic Upper Receiver - AR-10 - MRP-L - M-LOK - Rifle - 12.5" ranked #291 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #341 of the 1,578 upper receivers builders have added.
It was in stock most days in August 2026, and today both retailers we track have it in stock. It dipped to $1,052.10 at Brownells for a stretch in August 2026, well under its usual $1,181.70 to $1,300.99, so sales do come around. Buying today, the lowest price is $1,181.70 at Primary Arms, above August's low of $1,052.10, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Frequently Built With
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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