Abstract: A system for shooting a weapon that includes an activating module (10) able to be coupled to an actuating module (12) of a weapon, said activating module (10) actuates the actuating module (12) and shoots the weapon (1). The activating module (10) comprises a controller (18), an emitter (14) and a receiver (16) both optically coupled, where the controller detects an interruption of the beam of light received in the receiver (16) previously emitted by the emitter (14) and for generating, in response to said interruption, a trigger signal to actuate the actuating module (12) and shoot the weapon. Different embodiments are disclosed with and without triggers as well as variations in the configuration of the emitter-receiver pair.