Abstract: A reliable and robust electromechanical safety device maximises the security of a weapon by preventing accidental firing situations. The safety device includes a safety element for connecting or disconnecting a kinematic shooting chain; the safety element is arrangeable inside the weapon at its rear part, connecting with the trigger bar and the backstrap of the weapon. Therefore, by controlling the position of the trigger bar, it is possible to control the safe and firing position of the weapon, in addition to, and independent of, the other original weapon safeties.