A handgun with a fixed barrel and revolving coaxial cylinder composed of chambers holding ammunition to be presented successively before the barrel. A single action revolver must be cocked manually; pressure on the trigger will not cock the weapon. Conversely, applying pressure to the trigger of a double action revolver revolves the cylinder to align a chamber with the bore and cock the weapon. Further pressure releases the hammer to discharge the bullet. With a semi‐automatic revolver, the force of the recoil revolves the cylinder, aligns the chamber, and cocks the weapon. Trigger pressure will then discharge the weapon and repeat the process.