Shop BattleHawk Armory for the Mossberg 590 9 Shot Shotgun 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. This model includes a conversion kit to adapt from full stock to a Cruiser-style pistol grip configuration. The Mossberg 590 is the perfect choice for your personal and home defense needs. Features are dual extractors, positive steel-to-steel lockup, twin action bars and an anti-jam elevator ensure smooth operation. Top mounted safety provides for ambidextrous operation.