Abstract: An ejector for ejecting catridge cases from the cylinder of a revolver, comprises a pin for which the center of the revolver cylinder serves as a guide. A star-shaped disc is secured to this pin; and a flexible annular element whose outer edges are smoothed off, projects slightly from the bottom of each of the notches in the star-shaped disc. The annular element is secured to the disc against removal from the disc in a direction lengthwise of the pin; but the annular element can retract into the notches, so that when rimmed cartridges are introduced into the chambers of the revolver cylinder, the annular element retracts into the notches and slides along the cartridges. But when grooved cartridges are introduced into the cylinder chambers, the annular element retracts into the notches as the cartridges pass but projects again and penetrates into the cartridge grooves as soon as the cartridge grooves are situated in front of the annular element.