Lewis Machine & Tool

MARS-L SOPMOD COMPLETE LOWER RECEIVER

All Lewis Machine & Tool lower receivers
Lewis Machine & Tool MARS-L SOPMOD COMPLETE LOWER RECEIVER - Lower Receiver for AR-15 - view 1

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Lewis Machine & Tool

Overview

The MARS-L SOPMOD Complete Lower Receiver from Lewis Machine & Tool is designed as a fully assembled lower, ready for integration into your AR-15 platform. With its ambidextrous controls, this receiver offers versatility for both left- and right-handed shooters, making it a practical choice for a wide range of operators. This lower receiver is suitable for multi-caliber builds, but it is frequently paired with a carbine gas system and 5.56 NATO caliber for optimal performance in standard configurations.

Specifications

ControlsAmbidextrous
PlatformAR-15
CaliberMulti
AssemblyComplete

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Build history on GunPartPicker

Builders have added the Lewis Machine & Tool MARS-L SOPMOD COMPLETE LOWER RECEIVER to their builds on GunPartPicker. Since April 2026, it ranks #556 of the 1,217 lower receivers builders have added. Builds with this lower receiver are mostly chambered in 5.56 NATO (75%, then .223 Wylde 13%), split between carbine-length (50%) and rifle-length (50%) gas systems, and nearly all AR-15.

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Frequently Built With

The part most often added in each category by the builds that include this one

Daniel Defense MK18 RIII, 5.56mm, 10.3 Barrel, Black, Upper Receiver Group

Daniel Defense MK18 RIII, 5.56mm, 10.3 Barrel, Black, Upper Receiver Group

Upper Receiver$1,454 · out of stockin 20% of them
LMT Defense Short Tactical Charging Handle w/Enhanced Latch 7.62x51mm/6.5 Creedmoor, Black

LMT Defense Short Tactical Charging Handle w/Enhanced Latch 7.62x51mm/6.5 Creedmoor, Black

Charging Handle$123in 20% of them
Seekins Precision NX15 5.56 NATO AR-15 Bolt Carrier Group

Seekins Precision NX15 5.56 NATO AR-15 Bolt Carrier Group

Bolt Carrier Groupin 10% of them
Geissele Automatics .154" SSA Trigger

Geissele Automatics .154" SSA Trigger

Trigger$211in 10% of them
Emissary Development Handbrake - M-LOK - FDE

Emissary Development Handbrake - M-LOK - FDE

Foregrip$40 · out of stockin 10% of them
EOTECH 3x30.5mm X 21.6mm Holographic Hybrid Green Dot Sight - HHSGRN

EOTECH 3x30.5mm X 21.6mm Holographic Hybrid Green Dot Sight - HHSGRN

Optic$1,289in 10% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Caliber

75%
5.56 NATO75%
.223 Wylde12.5%
300 Blackout12.5%

Gas System

50%
Carbine50%
Rifle50%

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