Mossberg 500, Pump Action, 12 Gauge, 3 Chamber, 28 Vent Rib Barrel, AccuChoke, Parkerized Finish, Synthetic Stock, Bead Sight, 5Rd 56420 After over 50 years and over 10 million and counting, the most prolific and reliable shotgun in the world is also the most versatile shotgun available. There is a Mossberg 500 to fit every season, every application, and every user.