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




Daniel A. (verified owner) –
Sol is the man!! Shipped out the Mars-L stripped lower in time for me to finish my build for Christmas! Can’t recommend Rooftop Defense Enough!!!
David D. (verified owner) –
As always, the sweatshop puts its tired hands to good work and delivers me with not my first, or second, but 3rd LMT lower and not only are they incredibly based for the Constitution booklets they include, but also for keeping my little tummy full of nutritious Ramen. Thank you for all that you do and Merry Chrysler
Kolia K. (verified owner) –
Sol is the man and always takes care of us. LMT QC hasn’t been great lately but mine arrived in great shape. It’s a pleasure supporting rooftop.
Sean (verified owner) –
Great customer service and top quality items.
Tony (verified owner) –
After my purchase of the Mars L, I noticed the ambi mag release does not release… 6 different mags tested. It appears the lever curvature is not correct. I messaged Rooftop on Sunday of the week I am typing this. It is Thursday now. No reply from Rooftop but they asked for a review and I obliged.
Ordering was great, shipping was fast, communication so far is a no… Product quality is on manufacturer.
If you buy this lower, Take a few mags to your FFL and function test before you take possession.