The Colt Single Action Army revolver, introduced in 1873, became a symbol of power and American expansion, used by both outlaws and lawmen on the frontier. Witkoff says US ‘finally’ got answer ...

In all, between 1873 and 1891, before the Army replaced ... as these are sometimes retrofitted on First Generation guns. Chambered only for .45 Colt and .38 Spl., Second Generation Colts initially ...