https://www.bradsguns.com/in-store-firearms/long-guns-1810/used-mossberg-500-rolling-thunder-2504062

The 500 Rolling Thunder Shotgun .12 GA 23in CB, Mossberg part number 55605.

Mossberg Model 500 Special Purpose Rolling Thunder 12 Gauge
23 Inch Barrel With Stabilizer
Black 5 round Pistol Grip Only

Model: 500
Caliber: 12 Gauge
Action: Pump Action
Capacity: 2.75" 5+1
Finish: Matte Black
Stock: Black Synthetic Pistol Grip Only
Sights: Bead
Barrel: 23"
Length: 33.5"
Features: Synthetic Forearm with Black Strap