Got the Legendary Sparrow you can get by per-ordering the expansions, and I can't use the drives on it. Apparently rare Sparrows are better then legendarys... So that's stupid. *claps*
Edit: So I think there should be a way to upgrade legendary sparrows to an exotic status. You can upgrade rares, so why can't you upgrade legendarys?
-
These are used to make a sparrow that's non legendary into a legendary? That's the entire point of the item and why it can only be used on rare sparrows.