The original Ruger Blackhawk Flattop, introduced in 1955 as the first Ruger single-action with adjustable sights. Chambered in .44 Special, this pre-transfer bar gun was the direct predecessor of the New Model Blackhawk. A milestone in American revolver history. Type: Revolver Action: Single-Action Caliber: 44 Special Capacity: 6 Year introduced: 1955, USA Weight: 40 oz Overall length: 12.25" Status: Discontinued Intended use: Collector, Target