You're delusional
Emmeran: At 25 rounds per minute and a 30k range that 4.5in gun more than outguns anything prior to the Korean war, including the battleships.
Seriously? Let me dust off the USS Iowa and see how your pea shooter fairs against nine 16-inch (406mm) guns with a range of 23.4 nautical miles (40 kilometers)....
https://en.wikipedia.org/wiki/Iowa-class_battleship#/media/File:Uss_iowa_bb-61_pr.jpg