When you loot a purple upgrade kit it shows you the modules of that type you have of mks. 1-3, but not mk. 4, nor does it show you if you already have a purple one.
I’m sure I’m not the only one who paid to get a purple upgrade kit, only to find I’d already gotten a module to mk. 4 and forgotten about it. If I’f known I would not have paid to loot the kit.
Please let us have this information so we can make the correct decision.