This is a North American Arms Revolver: Single Action known as the Ranger Break Top chambered in 22M, model # NAA-22M-R250, UPC 744253003288
Model Series: Ranger Break Top
Gun Type: Revolver: Single Action
Caliber: 22M
Action: Single Action
Capacity: 5
Finish: Stainless Steel
Stock: Wood Boot Grips
Sights: Front Bead
Barrel Length: 2.5 Solid Ribbed
Overall Length: 6.0
Features: ADVISORY: Don't use PMC Ammunition PER MANUFACTURER