This type of handgun uses a round cylinder with holes punched in it that are designed to hold the cartridges. The cylinder revolves to bring a fresh cartridge under the firing pin. This type of handgun uses a magazine feeding device and will fire and eject a cartridge with each pull of the trigger by the user and was first invented in the year 1895. There are also some models of fully automatic pistols called machine pistols. As with all machine guns, possession of these has been heavily restricted since 1934.
Actions There are many types of actions.
The action is the moving parts of the gun that allow loading, firing and unloading of the gun. In a single-action gun, the trigger performs a single action. Namely the firing of the cartridge. In a double-action gun, the trigger can both cock the hammer and fire the cartridge, performing two actions. In a double-action only handgun, there is usually no external hammer spur that the shooter can pull back to cock the gun.