Antidismantling device for hand-guns

An antidismantling device for preventing dismantling of a hand-gun when a cartridge is present in the barrel (102) of the hand-gun, said barrel (102) being mounted in a breech block (110), and a sensor element (123), which is biased at least indirectly in the direction of the longitudinal axis (143) of the barrel (102), is located in the breech block (110) and comprises in the region of one end thereof at least indirectly a contact surface (121) for making contact with part of a cartridge (101) and assumes a position in relation to the breech block (110) when a cartridge (101) is present in the barrel (102) which differs from the position thereof assumed in the absence of a cartridge (101) in the barrel (102) and the sensor element (123) interacts at least indirectly with a safety mechanism (141) provided on the grip of the hand-gun in order to prevent dismantling of the breech block (110) when a cartridge (101) is present in the barrel (102) of the hand-gun wherein the sensor element is in the form of a guide pin which is biased at least indirectly in the direction of the longitudinal axis of the barrel and is slidably mounted in a bearing in the breech block, and one end of the guide pin at least indirectly abuts a contact surface for making contact with part of a cartridge and the guide pin (123) comprises a bearing surface (124) for functioning coactively with a pressure piece (131), which is biased by a spring (130) and which urges the indicator element (120) and thus the contact element (122) in the direction of the longitudinal axis of the barrel (102).