
I assumed from the science text that they are automatically applied like other techs (accuracy)...
Rapid fire? sounds sweet! (if somewhat vague) Lets see how the damage change: not at all, must be rubbish

But yesterday, playing the humans and their already modded heavy cruiser of awesome,
I saw that you have to activate the mods in the hardpoint to take effect.
On that note: Dark gray is often associated with options/buttons currently not available.
Like the term "the button is greyed out", means you can't press it.
I would suggest to choose a different effect/color for the meaning of "off" to differentiate from "not possible right now".
Like some options are not applicable when choosing windowed or fullscreen, then dark grey would be fitting.
I encountered this in the ship designer and the options menu.