Were any destroyers armed with six-inch guns?
Short answerYes, German ships carried weapons close to six inches without much success; on today's larger combatants an automated six-inch system could be more practical.
NotesGerman destroyers carried guns close to six inches during the Second World War with little success. That experience concerned ships of wartime destroyer size. Much larger modern surface combatants make an automated twin six-inch mounting an attractive proposal. Russia's existing 130 mm guns provide the comparison, while the larger weapon remains a preference for future armament.