Abstract: Projectile simulation means serve for an acoustic and/or optical representation of the firing of canons or the like. The projectile simulation means are arranged in a pivotable receiving plate of a firing apparatus. There is a danger that, when pivoting the receiving plate for closing the firing apparatus, the projectile simulation means drop out of the receiving plate.According to the invention, the projectile simulation means are provided with spring tongues (27) which project from the outside of the casing (11) and are pressed together when pushing-in the projectile simulation means into the receiving plate. In this manner, the spring tongues (27) are resiliently preloaded, as a result of which they hold the projectile simulation means in the receiving plate in a hook-lie manner.