This is a Cimarron Revolver: Single Action known as the Thunderball chambered in 357, model # PP340, UPC 844234127368
Model Series: Thunderball
Gun Type: Revolver: Single Action
Caliber: 357
Action: Single Action
Capacity: 6
Finish: Blue
Stock: Walnut 1 Piece Grip/ Thunderer Grip Frame
Sights: Fixed
Barrel Length: 3.5
Features: Made by Pietta/ Italy
