[DoodleDawg]

Could a 16 inch version of this be made?

No 16 inch guns anymore.

[X Fretensis]

No 16 inch guns on any ship currently in the U.S. Navy.
However 36 MK.7 16/50 caliber guns and 18 MK.6 16/45 caliber guns in the hands of various states or cities in the U.S.