Colt Frontier Six-Shooter was the actual name of the Colt pistol model, which was acid-etched on the left side of the barrel. After 1889, the legend was roll-stamped, with the designation ".44-40" added in 1919. Later Colt M1878 Double Action Army Models also received this designation on the barrel when chambered in .44 WCF/.44-40 Winchester. The Bisley 1895 Model was the final Colt to wear the Frontier Six Shooter designation.^[17]

The combination of a Colt Frontier Six Shooter revolver and the Winchester Model 1873 chambered in .44-40 WCF was one of the most common seen in "the Old West",^[17] carried, for example, by the two mounted "Cowboys" at the Gunfight at the O.K. Corral. Notably, Winchester never undercut itself by offering the M1873 chambered for .45 Colt. After the "frontier" days of the West had passed, the Winchester Model 1892 arrived, which joined the Model 1873 in also being offered in alternative .38-40 and .32-20 (.32 WCF) calibers, allowing the same convenience of carrying a single round for both revolver and rifle