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




Luan T. (verified owner) –
great product sold by an even better company! they shipped out the following morning and are amazing to deal with… wish i found out about this company sooner
Floyd D. (verified owner) –
Great service! outstanding lower and cant wait to put together my build. Will buy again from Rooftop!
Derek T. (verified owner) –
Can’t beat the price for a quality ambi lower. Sweatshop speed as advertised and free lunch comes with it. A+++
John B. (verified owner) –
Favorite lower by far. Rooftop is the GOAT!
Kenneth B. (verified owner) –
Awesome lower for a more than fair price. Sold by a hell of a team at Roof Top Defense. They are fast, helpful and stock hard to find quality parts.