LMT MARS-L Ambidextrous Stripped Lower Receiver

Lewis Machine & Tool's MARS-L (Modular Ambidextrous Rifle System - Lower) represents the pinnacle of forged lower receiver design. The MARS system integrates fully ambidextrous controls directly into a forged 7075-T6 aluminum receiver, combining the proven strength of forging with the ergonomic advantages typically found only in billet designs. Each control—selector, magazine release, and bolt catch/release—is machined into the receiver rather than added as an aftermarket modification.

The enhanced flared magwell is sculpted into the receiver's profile to facilitate rapid magazine changes under stress while maintaining mil-spec dimensions for complete compatibility with all standard upper receivers and components. The ambidextrous bolt catch and release mechanisms provide equally intuitive operation for left and right-handed shooters, with controls positioned for natural thumb activation without breaking firing grip.

LMT's MARS-L comes partially assembled with the ambidextrous magazine release, bolt release, and safety selector pre-installed, requiring only the addition of a trigger group, pistol grip, trigger guard, and takedown pins to complete. The forged construction provides superior strength at impact points while the hardcoat anodizing delivers military-grade corrosion resistance. For professionals demanding ambidextrous operation with forged durability, the MARS-L sets the standard.