A single action revolver is a type of firearm that requires the shooter to manually cock the hammer before each shot. This action prepares the gun to fire, allowing for a more precise trigger pull. When the trigger is pulled, the hammer falls, striking the firing pin and igniting the cartridge. These revolvers typically hold six rounds in a rotating cylinder and are known for their reliability and simplicity. Popularized in the American West, single action revolvers are often associated with historical figures like Wild Bill Hickok and are commonly used in shooting sports and cowboy action shooting events.