Might be a niche ideals yet NF related, but UP AA rockets for the Admiral class Battlecruiser, basically self defence barrage balloon which held a cable mid air & at the end was a mine, One of the German Marinefãhrprahm had similar weapons but the model was removed.
Squid mortars for all ships with the mount (Type 41, Dealey class) or mounts plated over (Battle/Daring classes).
Not per say armament but the Curtis O3U-1 Cosair for the USS Wyoming No.3 turret seen in the port but not in battle.
Similar add the Sopwith Camel & Sopwith 1½ Strutter to the flying off platform of the HMS Glorious.
Readd torpedo reloads to TB Chidori.
Add the ASROC system to JDS Chikugo DE-215 for the lolz even if as useless as some current weapons heh.
3pdr cannons for the Iron Duke class Super Dreadnought Battleship, (A mod did tell me they’re saluting guns but curse me for deleting a video of me talking with another player saying they’re the modern cannons as mentioned by a book) plus we already have similar useless cannons on several ships…
Gabbiano class corvettes having their stern depth charge rails usable, Also goes for all ships along with the mine rails too.
French Chacal class destroyer Léopard, both dual 13.2 mm HMG’s between the bridge superstructure & fore funnel LITERALLY UNPLAYABLE.
Dealey class DE, GFCS (Not sure why it’s still missing).
Not gonna go into missile armament but some ships currently are missing such.
AF,
All Nanchang Q-5’s are missing AAM’s from information I’ve read & from the bug reports I see.
Lockheed F-104A/C missing missiles which would easily make them 9.7 (RB), Also read somewhere the C model could carry four missiles & a M118 heh.
There are more things yet I cannot think atm.