in my opinion this would be pretty usefull and would improove ship design more.
the thing is bigger ships would have space for more guns and smaller ones could be able to have some better design options too.
it would not screw the tactic of ships as you would still need to have ammo around your rifles, and it would be really hard to make space in bigger and smaller ships too.
I would still keep the angles for rifles and flipped versions.
Hmm. I am minded to reject this suggestion. Reasons:
Well, It would also make sense to do so with grenades, I mean, all you have to do is chuck them out the window.