The LMT Defense MARS-L SOPMOD Complete Lower Receiver (brand part number M7DA4) is a fully assembled AR-15 lower from LMT Defense, built to the same MARS-L specification LMT supplies for military and law enforcement rifles chambered in .204 Ruger, 5.56 NATO, and .300 Blackout. It gives builders a ready-to-run lower half without sourcing and assembling individual small parts.

Key Specifications

• It’s a complete lower receiver, fully assembled and ready to mate with an upper without additional parts.
• Built to the MARS-L SOPMOD specification, matching the configuration LMT supplies for military and law enforcement use.
• It’s compatible with .204 Ruger, 5.56 NATO, and .300 Blackout AR-15 uppers.
• As an LMT Defense product, it carries the fit and finish of a duty-grade lower receiver.
• The Complete build style saves builders the time and small-parts sourcing of assembling a stripped lower by hand.

Frequently Asked Questions

Does this lower come assembled? Yes, it’s a complete lower receiver, fully assembled and ready to accept a compatible upper.

What calibers is the MARS-L rated for? It’s built for .204 Ruger, 5.56 NATO, and .300 Blackout AR-15 uppers.

Buy the LMT Defense MARS-L SOPMOD Complete Lower

Order this complete lower from our Lubbock, Texas gun shop for fast, insured shipping to your FFL. It’s a duty-grade foundation for shooters who want their AR-15 build to run like the rifles LMT builds for professional users. Shop our full AR-15 lower lineup selection for more options.