The Single-Six Convertible ships with two cylinders — one chambered for .22 LR and one for .22 WMR. The cylinders swap without tools, providing a single revolver that handles both rimfire calibers. The convertible concept was introduced in 1961 and remains one of the most practical features in Ruger's single-action line. Type: Revolver Action: Single-Action Caliber: .22 LR/.22 WMR Capacity: 6 Year introduced: 1961, USA Weight: 33.5 oz Overall length: 10.88" Status: Active Intended use: hunting, target, training