Carrier projectile for a gun having a barrel which extends along a central longitudinal axis, - having a projectile base, - having a body which is closed in an initial state and is connected to the projectile base, - the projectile base and the body enclosing a receiving space for a payload in the initial state, - having a holding means and having a deceleration mechanism acting on the holding means, - the body having at least two body parts (20a-d), - the body parts (20a-d) being held together as a body in the initial state by means of the holding means which is located in a holding state, and - the body parts (20a-d) being released from one another by means of the holding means, when the holding means is moved into a release state by the deceleration mechanism, - the holding means adopting the release state when a deceleration process started when the carrier projectile is fired ends in the deceleration mechanism, - the holding means and the deceleration mechanism being purely mechanical and optionally fitted with electrics/electronics if necessary, and therefore being designed without pyrotechnics and/or without stored chemical energy and/or without fuses, - at least two of the body parts (20a-d) each having a first form-fitting element of the holding means, and the holding means containing a central part (28, 56), which has a second form-fitting element for each of the first form-fitting elements, and the first and second form-fitting elements being in form-fitting engagement in the holding state, in order to hold the body parts (20a-d) together as a body in the initial state, the first and second form-fitting elements being moved away from one another in the release state, the first and second form-fitting elements being engaged before and during the deceleration process by the deceleration mechanism and being moved away from one another at the end of the deceleration process by the deceleration mechanism, the second form-fitting elements being fixed in the initial state by a tear-off means, the tear-off means being releasable by the firing shock. - having a projectile base, - having a body which is closed in an initial state and is connected to the projectile base, - the projectile base and the body enclosing a receiving space for a payload in the initial state, - having a holding means and having a deceleration mechanism acting on the holding means, - the body having at least two body parts (20a-d), - the body parts (20a-d) being held together as a body in the initial state by means of the holding means which is located in a holding state, and - the body parts (20a-d) being released from one another by means of the holding means, when the holding means is moved into a release state by the deceleration mechanism, - the holding means adopting the release state when a deceleration process started when the carrier projectile is fired ends in the deceleration mechanism, - the holding means and the deceleration mechanism being purely mechanical and optionally fitted with electrics/electronics if necessary, and therefore being designed without pyrotechnics and/or without stored chemical energy and/or without fuses, - at least two of the body parts (20a-d) each having a first form-fitting element of the holding means, and the holding means containing a central part (28, 56), which has a second form-fitting element for each of the first form-fitting elements, and the first and second form-fitting elements being in form-fitting engagement in the holding state, in order to hold the body parts (20a-d) together as a body in the initial state, the first and second form-fitting elements being moved away from one another in the release state, the first and second form-fitting elements being engaged before and during the deceleration process by the deceleration mechanism and being moved away from one another at the end of the deceleration process by the deceleration mechanism, the second form-fitting elements being fixed in the initial state by a tear-off means, the tear-off means being releasable by the firing shock.