An ejection weapon for weapon launcher tube; launch tube weapon and associated submarine

This device comprises a cylinder and actuating means of the jack, the jack having a cylinder (74) integral with a wall of the tube and a rod (76), a stroke of a distal end of the rod extending parallel but away from the longitudinal axis (Z) of the tube, the rod being provided with a head (78) able to bear a mechanical interface (34) provided on a side surface of the weapon ( 20) to be ejected from the tube, and applying a pushing force on this own mechanical interface to move the gun along the longitudinal axis of the tube.