Single Action Army in .38-40 Winchester, a classic transitional-era caliber popular in the frontier West for its combined use in rifle and revolver. Type: Revolver Action: Single-Action Caliber: .38-40 Win Capacity: 6 Year introduced: 1873, USA Weight: 40.5 oz Overall length: 10.75" Status: Active Intended use: Cowboy Action, Collecting, Western