Introducing the MCX-REGULATOR, using the heart and soul of the legendary MCX platform combined with a proprietary lower design, all built around shooter ergonomics comes a whole new level of MCX modularity. Never before has a ranch rifle possessed the DNA of a rifle used by elite Special Forces operators around the world. The MCX-REGULATOR is an aluminum frame rifle with a gas-piston operating system, a Magpul SGA Mossberg 500/590 traditional stock combined with a redesigned lower receiver compatible with all MCX upper receivers. It has a fully ambidextrous magazine release, safety selector, and bolt catch.