The rifle was a standard percussion cap musket and saw extensive usage ... cap-and-ball revolver that operated with a dual trigger mechanism with one rotating the cylinder and cocking the gun ...

It was loaded through the muzzle and fired by pulling the trigger, which struck a percussion cap and detonated the ... with the two firing mechanisms making it unusually weighty for a handgun.

Reverend Alexander Forsyth patents the first percussion ignition ... Pulling the trigger springs a hammer that strikes a brass or copper cap filled with a pressure-sensitive fulminate of mercury ...

Bill Harriman, firearms specialist on BBC One's Antiques Roadshow, told Making History that a flintlock is a mechanism attached ... was replaced by the percussion cap.