Could twin five-inch naval mounts return?

Have navies seriously considered returning to twin five-inch gun mounts?

Yes, concepts continue to appear, but the gain in volume of fire must justify the accuracy and mounting complications.

The answer frames the design choice as volume of fire versus precision. A single barrel avoids the small disturbance produced when its neighbor fires, an effect that can matter at long range. Simultaneous fire and modern rapid-fire mechanisms can reduce that disadvantage, while two barrels still deliver more rounds from one position. Twin-mount concepts have continued to appear at industry conferences, so the idea is alive even though no return has yet occurred.