Buy Taylor’s & Co Open Top Early/Navy Revolver. The Taylor’s & Co Open Top Early/Navy Revolver comes with a case-hardened forged steel frame, round barrel with front blade sight, modern ejector rod and a rear sight notch on the rear of the barrel. The Navy version includes a brass backstrap and triggerguard with a smaller Navy grip. Although it appears to be a conversion, the 1871-72 Open Top model was Colt’s first revolver specifically manufactured to fire a centerfire cartridge by incorporating the loading gate in the frame. Since Colt did not use percussion revolver parts, the revolver was manufactured as an entirely new model, first with Navy-sized grips, later with Army-sized grips.