The Colt Frontier Six-Shooter, the SAA variant explicitly marked for .44-40 WCF. The most popular SAA caliber pairing with the Winchester 1873. Type: Revolver Action: Single-Action Caliber: .44-40 WCF Capacity: 6 Year introduced: 1878, USA Weight: 40 oz Overall length: 13" Status: Discontinued Intended use: Collector, Cowboy Action