A system for electronic simulation of live ammunition when firing a small arms, comprising: a magazine to be inserted in a magazine funnel of the arms simulating a live ammunition magazine; a trigger module to be mounted on the arms, the trigger module comprising a trigger actuator for mounting on a trigger of the arms and a safety catch actuator for mounting on a safety catch on the arms; and a sound producing device for simulation of shots. The invention replaces ordinary blank ammunition in the magazine with an electronic solution.