This is a Mossberg Shotgun: Pump Action known as the 500 chambered in 20 Gauge, model # 54250, UPC 015813542500
Model Series: 500
Gun Type: Shotgun: Pump Action
Caliber: 20 Gauge
Action: Pump Action
Capacity: 2.75 5+1
Finish: Blue
Stock: Black Adjustable Synthetic Stock
Sights: 22 Twin Bead & 24 Adjustable Rifle Sights
Barrel Length: 22 Vent Rib & 24
Overall Length: 39.75 or 41.75 Minimum Length of Pull
Features: Sling Swivel Studs