Mossberg 590, Pump Action, 12 Gauge, 3 Chamber, 20 Cylinder Barrel, Blue Finish, 6 Position Collapsible Stock, Bead Sights, 8Rd 51672 With credentials hard-earned over decades of military and law enforcement use, the 590 shotgun is the perfect choice for your personal and home defense needs. Dual extractors, positive steel-to-steel lockup, twin action bars, and an anti-jam elevator ensure smooth operation.