Board Thread:Wikia Discussion/@comment-25683568-20150318062713/@comment-25606292-20150628111916

It's most likely a subtle reference to the Oerlikon. The Americans, in fact, used them mainly in single mounts as a close range defensive armament as seen in this case. Generally, nothing larger than 14.5mm (a Russian caliber) is considered a Machine Gun in English, up to and including even the German 15mm MG151/15. I've seen '20mm and up' used as a definition before, so it may be that the MG151/15 is an exception.

I could give it a shot but I'm unfamiliar with the process as I generally don't make edits and so am not very comfortable in doing so. Although, actually, reexamining your last major post perhaps just listing it as an alternate name (like the 10cm AAFD example) would be more suitable. Besides, I'm not very sure how exactly that alternate translation came to be in the first place, although I can think of several reasons, so that may be for the best. It's more a language thing, I think. (The Kanji used can apparently be pronounced either way according to the dictionary I checked [?], and the Hiragana for Hi and Bi are easily confused visually.)