LMT MARS-L Forged Complete Ambidextrous Lower Receiver
The Lewis Machine and Tool MARS-L complete 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 lower receiver is designed with several unique LMT® features to further enhance its durability and versatility. These features are: Two-stage trigger group, winter trigger guard, ergo grip, QD endplate, and SOPMOD buttstock.
Features:
- Forged 7075 aluminum
- Hardcoat anodized
- Compatible with Mil-Spec AR-15 lower parts
- Precise tolerances




Jason R. (verified owner) –
Customer service was fantastic. I reached out with a question and they responded within 24hours. Not only did it answer my question, they were polite, personalized their response and tone was great. I could probably be friends with that person if we run into each other at the range. Okay, product review. The lower is AWESOME!! Way more then what I expected. Full ambidextrous comfortable feel for the Left-hand shooter I am. Don’t hate! Lol The magazine clip and release is smooth and fits absolutely perfect. Grip is awesome wish FDE or OD was a option but black works for my build. I mated the LTM Mars lower with a left-hand BlackOut upper. Not only does it look great but makes use extremely easy. The other lower Im using for my DDM4A1 fsp build and its beast! Yes, it’s right handed but the build with the LMT lower makes it a tank. Thank you Rooftop Defense for swift question response and fast shipping. You didn’t make the lower but your store front had great products. Buyers beware, LMT Mars lower is out of this World. Like to Mars! LOL BlkRCo coffee is responsible for my review.
John R. (verified owner) –
Exactly what I was after. Grip received was the gen 2, not the gen 1 ergo that is pictured, but still extremely happy with my purchase.
D T. (verified owner) –
Need to revise earlier review after completing some builds. LMT specs are not up to the hallowed tier they have a reputation for. Sloppy variable gapping with LMT uppers, and castle nut barely dimpled. The Axle trigger also leaves a bit to be desired when compared to a Larue MBTS.