This is a solution for weapon drops as well as a solution for storage issues. The solution is to add a drop down selector for each perk. As you acquire the same weapon with different perks in each column, those perks are added to the drop down selector. This option will cut down on the amount of farming one has to do to get desired rolls on a weapon and it also allows someone to change the weapon rolls depending on the situation. This also cuts down on storage issues. Instead of having several copies of a weapon with different rolls, now I only need one copy of that weapon because I can change the roll via the drop down selectors. This would also be beneficial for the masterwork selection (Range, Stability, etc.). To take this idea even further, it would be great if we can actually delete weapons or "archive" weapons and have the ability to pull them from archives with the same drop down perks we already earned. I hope to see this feature in a future update!