Hello, recently playing I found a way to remove exclamations from weapons that are achieved in missions and cannot be dropped or stored.
I know that many people have this same problem that I have not found a solution anywhere on the internet so far.

REQUIREMENTS: Not have completed the mission called Sweet Dreams.

SOLUTION: Carry the bugeada weapons in the inventory (I also had them equipped) and when you collect your arsenal and equip the weapons, the exclamation will disappear.

I hope I have been of help to all and to enjoy cyberpunk 2077!

If you drop them, don't they just vanish? I've dropped items here and there by mistake and they don't actually drop, they just go poof and I never see them again.