So i know this has probably been suggested before, but i couldnt find it so this would be a system kind of like the one of call of duty black ops 2

There should be an npc that keeps track of your weapon “challenges“ for example a nitronome bomb some of them could be kill 10000 enemys with the nitronome, deal 100000 thousand damage in lockdown with the nitronome etc..

This challenges would take a looooong time to achieve so not many people would have them also so OOO can make profit you can buy all of the skins of a weapon for 2-3 dollars

So what do you think