What a modern quadruple naval turret might become

What would a modern quadruple naval gun turret look like?

Large guns would likely remain four separate gun lines, while smaller calibres could use compact rotary arrangements such as a four-barrel 3-inch mount.

A modern 5- or 6-inch quadruple turret would probably keep four distinct gun lines because of barrel and ammunition scale. Smaller calibres permit more radical layouts. One engineering study proposed a rotating four-barrel 3-inch mount. Scaling that arrangement to battleship guns would exceed practical structural and metallurgical limits.