This is a Mossberg Shotgun: Pump Action known as the 500 chambered in 20 Gauge, model # 54188, UPC 015813541886
Model Series: 500
Gun Type: Shotgun: Pump Action
Caliber: 20 Gauge
Action: Pump Action
Capacity: 2.75 5+1
Finish: Blue
Stock: Hardwood/ Checkered
Sights: 22 Twin Bead and 24 Adjustable Rifle
Barrel Length: 22 Vent Rib and 24
Overall Length: 40.75
Features: Sling Swivel Studs