The Military Armament Corporation MAC RA9S builds on the RA9 platform with a longer 4.75″ barrel and lightened slide while retaining the modular RA9 Monoblock System. Its serialized fire-control chassis is designed to support interchangeable and upgradeable compatible grips and slides across the RA9 family. Weight-saving window cuts in the top and sides of the slide distinguish the RA9S from the standard model, while the polymer grip module keeps overall weight to 29 oz. The result is a full-size, optics-ready configuration that expands the RA9 platform without moving away from its modular foundation.