A pistol has a forwardly extending cylindrical shaft with a cylindrical bearing surface. A rotatable cylinder is mounted on the bearing surface. A cylindrical chamber in the rotatable cylinder receives a cartridge. A firing pin ring with a firing pin aligned with the chamber is mounted on the bearing surface. A hammer safety lock includes a hole in the firing pin ring with a rearwardly extending pin. A barrel receives the cylindrical shaft. A barrel sleeve is positioned between the barrel and the shaft. A cartridge extraction tool is operable after axial sliding and separation between the cylinder and the cylindrical shaft. The cartridge extraction tool is adapted to be inserted into the chamber of the cylinder from the end remote from the firing pin ring to remove a cartridge.