This is a Mossberg Shotgun: Pump Action known as the 500 chambered in 410 Gauge, model # 50104, UPC 015813501040
Model Series: 500
Gun Type: Shotgun: Pump Action
Caliber: 410 Gauge
Action: Pump Action
Capacity: 5+1
Finish: Blue
Stock: Checkered Hardwood
Sights: Bead
Barrel Length: 24 Vent Rib
Overall Length: 43.75
Features: Sling Swivel Studs