The SIG MPX SD (Suppressor-Ready) is a factory-threaded pistol variant of the MPX optimized for use with a suppressor. Short barrel with a factory-installed suppressor mount. Gas-operated short-stroke piston. Accepts proprietary MPX magazines. One of the premier factory suppressor-host PCCs. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 30 Year introduced: 2020, USA Weight: 70 oz Overall length: 22" Status: Active Intended use: Law Enforcement, Home Defense, Suppressor Host