LMT Monolithic Upper Receiver - AR-15 - MRP-L - M-LOK - Rifle - 13.25"
Click to see full view
Lewis Machine & Tool
Overview
The LMT Monolithic Upper Receiver is a complete assembly designed for the AR-15 platform, featuring a streamlined design that integrates the rail and upper into a single unit. With a barrel length of 13.25 inches, this upper is optimized for compact builds while still providing versatility in handling and accuracy. It is commonly utilized in builds chambered in .223 Wylde, making it a suitable choice for those looking to maximize performance with both .223 Remington and 5.56 NATO cartridges.
Specifications
LMT Monolithic Upper Receiver - AR-15 - MRP-L - M-LOK - Rifle - 13.25"
August 2026 on GunPartPicker
LMT Monolithic Upper Receiver - AR-15 - MRP-L - M-LOK - Rifle - 13.25" ranked #168 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #282 of the 1,572 upper receivers builders have added.
It was in stock most days in August 2026, and today 2 of the 3 retailers we track have it in stock. It dipped to $758.99 at KY Gun Company for a stretch in August 2026, well under its usual $940.50, so sales do come around. Buying today, the lowest price is $940.50 at Brownells, above August's low of $758.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
Not sure which upper receiver to pick?
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Frequently Built With
The part most often added in each category by the 9 builds that include this one
Geissele Automatics AR-15/M16 Super Charging Handle, Ddc
LMT MARS-L Ambidextrous AR-15 Stripped Lower Receiver
LMT Full-Auto 5.56 Enhanced AR-15 Bolt Carrier Group
Geissele Automatics Super Semi-Automatic Enhanced SSA-E Two Stage AR-15 Trigger
Surefire Masterfire Weapon Light 4" 350 lm - X400VHBIRC
BCM Gunfighter Short Vertical Foregrip KeyMod, FDE - BCM-VG-KM-MOD-3-FDE
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.
No reviews yet. Be the first to review this product!