Topic summary
Caplock

Extracted from the Wikipedia article Percussion cap.
Later firearms evolution
Caplock revolvers such as the Colt Navy and Remington were also widely converted during the late 19th century, by replacing the existing cylinder with one designed for modern ammunition. These were used extensively by the Turks in the Russo-Turkish War, the US Cavalry during the Indian Wars, and also by gunfighters, lawmen, and outlaws in the old west.