This section addresses the parts of double-action and double-action-only revolvers and what each part does.
The Parts of a Revolver
Parts of a modern double-action revolver
The grip is what you hold onto when you are shooting.
The front end of the barrel is called the muzzle. The muzzle is where the bullet comes out after you pull the trigger.
The hammer is shown locked-back in the cocked position. Not all revolvers have a visible hammer—you will not see a hammer in double-action-only revolvers.
The trigger guard protects the trigger from being depressed accidentally.
The trigger pulls back to discharge the revolver. It also rotates the cylinder to move live ammunition to the firing location.
The cylinder holds the ammunition.
The cylinder release allows you to swing the cylinder out of the revolver for activities such as loading, unloading, and checking to see if the revolver is loaded.
The front sight and rear sight help you aim the gun.
How a Revolver Works
A revolver is pretty simple. Every time you pull the trigger, the cylinder rotates, which moves a fresh cartridge into the firing position and the hammer is released. The hammer forces the firing pin against the fresh cartridge, firing the gun.
It is easier to watch an animated explanation rather than read it here. Please view the following video.
When you reach the link, scroll down and click on the trigger.
For a more thorough graphic and explanation, please see the following video.