Part of the appeal of recent Call of Duty multiplayer is the progression, both with unlocking new perks and gear as well as skins for the various weapons. Call of Duty Vanguard is no different as its weapons all come with various challenges for players to knockout which then reward various cosmetic skins. The real prize for many players are the upper teir mastery weapon skins like Gold, Diamond, and Atomic, unlocked once all previous teirs before them have been accomplished.