The MDT LSS Gen3 Chassis Base is the foundational component of MDT's modular chassis system, built specifically for left-hand Ruger American Short Action rifles. Machined from 6061 aluminum and finished in durable Cerakote, it drops in without gunsmithing and accepts AICS-pattern magazines for reliable, repeatable feeding. As the core of the LSS GEN3 system, it supports interchangeable buttstock interfaces, forends, and grips, letting left-handed shooters reconfigure their rifle from a lightweight hunting setup to a fully weighted competition rig without ever removing the barreled action or disturbing their zero. At just 1.36 lb, the base keeps the overall build light while providing a rigid, precision-fit foundation for further customization. Backed by MDT's 30-day return policy and lifetime product support, it gives left-handed Ruger American owners the same modular upgrade path available to right-handed shooters.