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.
Features:
- Forged 7075 aluminum
- Hardcoat anodized
- Compatible with Mil-Spec AR-15 lower parts
- Precise tolerances




Christopher B. (verified owner) –
Fantastic fit and finish all controls work well (as expected from LMT), shipping was 3 days faster than estimated which goes much appreciated. Only complaint is the tolerances were really tight on the geissele lower parts kit I used to furnish the lower but it does not impede function just caused mild frustration getting it put together. All in all 11/10.
Huy T. (verified owner) –
Hi I just purchased lmt marl lower from rooftop defense this is my third lmt from different dealer 1st from boss fire arm 2nd from riffle gear and this one from rooftop defense and. I do have good service with all of these dealer but the lower from riffle gear don’t have cosmetic problems , the one with boss fire arm & rooftop defense have tool marks I am really disappointed . If you want picture to proof I can have it. I don’t know lmt don’t have quality control or else.
Devin C. (verified owner) –
My thrid LMT lower. If you are getting it from anywhere other than Rooftop, you are wrong. They are legit the best in the business. Have always gotten my orders out when promised. I remember a couple months ago, my order was shipped literally 4 minutes after i placed it. Love this company.
Elvis N. (verified owner) –
had to get a second one
Logan B. (verified owner) –
One of best lower on the market and you can’t beat the price from Rooftop