Mrp-L M-LOK Specwar 5.56mm Assembled Upper Receiver - Mrp-L M-LOK Specwar 5.56mm 11.5'''' Assembled Upper Receiver
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Lewis Machine & Tool
Overview
The Lewis Machine & Tool MRP-L M-Lok Specwar 5.56mm assembled upper receiver is a complete unit designed for the AR-15 platform, featuring an 11.5-inch barrel optimized for 5.56 NATO ammunition. This upper receiver is built with a carbine gas system, which ensures reliable cycling and performance, making it a solid choice for tactical applications and short-barreled rifle builds. It's commonly found in builds that prioritize maneuverability and rapid handling while maintaining effective range.
Specifications
Mrp-L M-LOK Specwar 5.56mm Assembled Upper Receiver - Mrp-L M-LOK Specwar 5.56mm 11.5'''' Assembled Upper Receiver
September 2026 on GunPartPicker
Lewis Machine & Tool Mrp-L M-LOK Specwar 5.56mm Assembled Upper Receiver - Mrp-L M-LOK Specwar 5.56mm 11.5'''' Assembled Upper Receiver ranked #168 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #133 of the 1,652 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO and nearly all AR-15.
It was in stock most days in September 2026, and today 3 of the 5 retailers we track have it in stock. It dipped to $758.99 at KY Gun Company for a stretch in September 2026, well under its usual $940.50, so sales do come around. Buying today, the lowest price is $912.60 at BattleHawk Armory, above September's low of $758.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 18 builds that include this one
LMT MARS-L Ambidextrous AR-15 Stripped Lower Receiver
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Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
FAXON Chameleon 5.56 Complete Nitride Bolt Carrier Group - FF556BCGCNITRIDE-NCR
Magpul AR-15 CTR Stock Collapsible Mil-Spec Black
Magpul MOE K2 Grip Polymer Gray
Builds Featuring This Part
See all 1 →Builds in the community that include the Mrp-L M-Lok Specwar 5.56mm Assembled Upper Receiver - Mrp-L M-Lok Specwar 5.56mm 11.5'''' Assembled Upper Receiver
| Build | Parts | Total |
|---|---|---|
 | 21 | $2572.99 |
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