Could railguns bring back stern-mounted main guns?

Will the US Navy return to six-inch guns or build future ships with bow and stern main guns?

Five-inch remains the practical answer for now, but successful railguns could revive multi-turret layouts including a stern gun.

The 5-inch gun remains the practical present standard while navies fund development of electromagnetic successors. If railguns become genuinely effective, their range and striking power could justify several main mounts on one ship. A three-turret layout with two forward and one aft would restore a stern main-gun position largely absent from modern combatants. Both the eventual calibre and arrangement remain projections rather than settled design facts.