the leveling up of t/d items

[The Black Parade]

I was inspired to make this thread by this thought, I want to try and give ideas as to how a leveling up system would work on certain detective and traitor items.

How would it look?

So maybe to upgrade equipment you can open up a new gui, listing all of the traitor and detective items. You can select a equipment that can be leveled up.
Maybe when a item has a few levels it shows like "+X" or some sort, and when it is maxed, there is a gold border around it?

How would I level it up

What I think is that each equipment is leveled up differently, by how you use it. For a basic outline of what it could be, for the knife you need to get kills, simple as that, maybe with the plasmanet, you just have to hit players. You can also get creative with it, like maybe backstab kills, or kill a player by pushing them off the ledge with the newton. it's ultimately up to you to think how to level a equipment up.

What stats/perks do I get?

Personally, I'm not a fan of enhancing weapons, it seems kinda boring to level up 2% of a weapon's damage. Of course, having a whole systems of elaborate perks would take a long time to make.
Maybe 5 levels per equipment? I cant think of the best way to level up a equipment, because each one would have to be very unique.

These are just my thoughts, please share some also.