LMT MARS-L Forged Stripped Ambidextrous Lower Receiver
The Lewis Machine and Tool MARS-L stripped lower receiver is an excellent starting point for a hard-use rifle.
The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver offers ambidextrous controls to include: selector, magazine release and bolt catch and release. An enhanced flared magazine well and ambidextrous magazine and bolt catch mechanisms are machined directly into the receiver and have been designed to function as ergonomically as possible.
This “stripped” version comes only with the ambidextrous components installed.
A slightly older stock photo is being used. These lower receivers are no longer marked as 5.56 and are now marked as ‘MULTI-CAL’.
Features:
- Forged 7075 aluminum
- Hardcoat anodized
- Compatible with Mil-Spec AR-15 lower parts
- Precise tolerances
Don B. (verified owner) –
Outstanding service! Shipped a few hours after I ordered it . The LMT MARS-l lower arrived in excellent condition. It’s going to look great with my Daniel Defense MK18 upper. I will absolutely be doing more business with this company.
Austen (verified owner) –
The team at Rooftop Defense are quick to respond and were wonderful at helping me get this lower in a timely fashion. They have a fun sense of humor and i couldnt recommend them enough. This is my first time ordering any gun part online, but i will definitely be returning for the rest of my build!
(verified owner) –
Looks like LMT is finally squared away with the new MARS-L 2026 batches!
My armorer gauged my first MARS-L just to verify, and everything is within spec. Some older batches from 2020-2025 had QC issues, but these have no offset dimensions whatsoever or blemishes.
D T. (verified owner) –
Stripped ambi lower is looking good so far. Still need to assemble for confirmation, after restocking on ramen later.