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 single round to be discharged with each pull of the trigger. The design typically features a rotating cylinder that holds multiple cartridges, enabling the shooter to fire several rounds before needing to reload. These revolvers are known for their simplicity and reliability, making them popular among enthusiasts and collectors. Famous examples include the Colt Single Action Army and the Remington Model 1875, both of which have played significant roles in American history and culture.