The MCX-Regulator- using the heart and soul of the legendary MCX platform combined with a proprietary lower design, all built around shooter ergonomics. Featuring an aluminum frame; Magpul SGA Mossberg 500/590 traditional stock; lower receiver compatible with all MCX upper receivers; receiver finish in Reduced Weapons Visual-IR Signature GEN II NiR FDE Cerakote; fully ambidextrous magazine release, safety selector and bolt catch; two-stage match trigger; cold hammer-forged carbon steel barrel; SIG-designed muzzle brake and a built in ARCA Rail for easy tripod mounting. Includes 10rd polymer magazine.