The Mossberg 590M converts the proven 590 pump platform to a detachable box magazine feed system. Available with 5, 10, 15, or 20-round magazines, the 590M retains the 590's mil-spec construction, dual extractors, and top-mounted tang safety. The magazine well is machined into the receiver — not a conversion — making the feed system integral to the design from the start. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 10 Year introduced: 2019, USA Weight: 96 oz Overall length: 40" Status: Active Intended use: tactical, home_defense, law_enforcement