The Lewis Machine and Tool MARS-L is a fully ambidextrous AR-15 lower receiver. It comes partially assembled with an ambidextrous magazine and bolt release and safety selector, so all you need to add is your favorite trigger, pistol grip, trigger guard, and takedown pins. The LMT MARS-L lower receiver is the perfect start to your dream AR-15 build. It is forged from 7075-T6 aluminum and hardcoat anodized for maximum durability. This stripped lower receiver is built to Mil-Spec dimensions to ensure a proper fit with other upper receivers and components.

The LMT Modular Ambidextrous Rifle System (MARS) M7SL lower receiver offers ambidextrous controls to include the safety selector, magazine release and bolt catch and release. The 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. The stripped variant ships with all proprietary controls already installed. The manufacture's part number is M7SL Specifications Manufacturer: LMT Defense Model: MARS-L Stripped Caliber: