We have to not only farm the craftable weapons but also farm the memento just to use it on a craftable weapon to level it up to 30 to be able to use the shader once per memento. Reward the players and make the memento shaders universally available after unlocking it on a weapon.
-
OK but hear me out. The mementos itself doesn't work anyway because only you can see ur tracked kills in said gamemodes. And most shaders don't shade guns well anyway. Just remove them.