Mossberg 590 Tactical, Pump Action Shotgun, 12 Gauge, 18.5 Barrel, 3 Chamber, Matte Blued Finish, Synthetic Stock, Cylinder Bore, Bead Sight, 6Rd 50778 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.