LMT MARS-LS Complete Ambidextrous AR-15 Lower Receiver
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Lewis Machine & Tool
Overview
The LMT Mars-LS Complete Ambidextrous AR-15 Lower Receiver is a fully assembled lower designed for versatility, accommodating multiple calibers. With its ambidextrous controls, this receiver allows left- and right-handed shooters to operate comfortably, while the .154 trigger pin ensures compatibility with a wide range of trigger assemblies. This lower receiver is commonly found in builds utilizing a carbine gas system, making it a solid choice for those looking to create a reliable and adaptable AR-15 platform.
Specifications
Available Merchants(4)
Prices checked
Price Alert
September 2026 on GunPartPicker
LMT MARS-LS Complete Ambidextrous AR-15 Lower Receiver ranked #76 of the 477 lower 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 #135 of the 1,105 lower receivers builders have added. Builds with this lower receiver are mostly chambered in 5.56 NATO (88%), mostly on mid-length gas (60%, then carbine-length 27%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 3 of the 4 retailers we track have it in stock. The best price crept up from $816.99 to $969.30 over September 2026. Buying today, the lowest price is $940.50 at BattleHawk Armory, above September's low of $816.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Fightlite Industries Mcr Dual-Feed Upper MLOK
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
B5 Systems SOPMOD Enhanced Stock, Multi-Camo Black - SOP-1422
Wilson Combat M16 Bolt Carrier Assy 5.56 NATO Polished Nickel Boron
EOTECH 3x30.5mm X 21.6mm Holographic Hybrid Green Dot Sight - HHSGRN
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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