This is a Ruger Revolver: Double Action known as the LCR chambered in 22M, model # 5439, UPC 736676054398
Model Series: LCR
Gun Type: Revolver: Double Action
Caliber: 22M
Action: Double Action
Capacity: 6
Finish: Matte Black
Stock: Hogue Tamer Monogrip
Sights: FT: Replaceable Pinned Ramp/ RR:U-Notch Integral
Barrel Length: 1.87 Stainless Steel
Overall Length: 6.5
Features: External Hammer
