Updated Single-Six with Ruger's transfer bar safety system and a second interchangeable cylinder in .22 Magnum, providing two calibers in one revolver. Type: Revolver Action: Single-Action Caliber: .22 LR Capacity: 6 Year introduced: 1973, USA Weight: 35 oz Overall length: 11.13" Status: Active Intended use: Plinking, Outdoor, Hunting