So, I am not sure why I didn't post this before, it just came back to my mind, that post on donor SGs colors triggered the memory xD.

Anyway, not sure if this has been suggested but I will say it anyway:
Let each person select which item they want shown as their donor item, so if they buy x2 donor SGs (10s) they will be able to put the stats of the 2 donor SGs to whichever shotgun item there is on the shop.

If you do not understand my idea, post here and I will address it as soon as possible, have to leave for uni now