Mossberg 590 7-Shot Matte Blued 410 Gauge 3in Pump Action Shotgun - 18.5in - The Mighty 590. With decades of military and law enforcement duty and countless performance and success stories under its belt, it's no surprise that the 590 chosen for duty around the globe is also the ideal choice for home defense needs. Dual extractors Steel-to-steel lockup Top-mounted ambidextrous safety Twin action bars Anti-jam elevator Browse all Mossberg 590 Shotguns.