A breech device (100) for a handgun has an impact base (120) in a central recess (110) in said breech device (100). The impact base (120) is in the form of a front end face of an impact-base member (160) in the central recess. A main functional region (150) is between said impact base (120) and a rear end face (140) of said breech device. At least one percussion member (300) for firing a cartridge and also a surface of a cartridge slide (211) are in the main functional region (150). The surface of the cartridge slide (211) is adapted to abut cartridges mounted in a magazine (100) in a neutral position of the breech device.
