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




Erik (verified owner) –
First order with Rooftop. Order was shipped like an hour after I placed it.
Sol was returning emails to me within 10 minutes. Customer service is at least a 10 out of 5. I’ve never seen it before.
Great price, extra cool gifts that come in the box with a note. Accidently stumbled across Rooftop, but they are definitely gonna be my go to for things that they sell.
Thanks Sol!
Bruce C. (verified owner) –
Shipped quickly; receiver is perfect. Love Rooftop. Thank you Sol!
Jacob V. (verified owner) –
Rooftop is the only place to buy LMT uppers, lowers and parts. You guys rock!
Matthew B. (verified owner) –
Easily one of my favorite ambi lowers! The only thing I’d change is the safety selector.
Matt W. –
LMT Mars lowers are one of the best ambidextrous lowers available. Excellent quality and materials combined with highly functional design make for a great lower receiver.