Colt Single Action Army First Generation in 44-40 WCF with standard 4.75-inch Civilian barrel — the 'Frontier Six-Shooter'. Type: Revolver Action: Single-Action Caliber: 44-40 WCF Capacity: 6 Year introduced: 1877, USA Weight: 37 oz Overall length: 10" Status: Discontinued Intended use: collecting, cowboy action