Turret Europe #2, Panzer IV Short Barrel (n-scale)

Direct fire, long barrels sure do pack a punch but they can get more than a little bent out of shape by the odd bridge, tree or urban structure if the gunner is fixated on a target or just plain forgetful. Why not swap a long barrel out for the Panzer IV inspired short barrel. It fires a slower shell but with the improved HESH head round to ensure tanks are still thinking twice about attacking the train.