Call of Duty: Black Ops 4 introduces a new system to the shooter series called Signature Weapons.
These are cosmetic variations of the base weapons in the game, Activision said in a blog post, and they come with their own challenges and rewards.
The publisher stressed the Signature Weapons do not have any game-altering stats, so perform exactly like their base weapon counterparts. They’re just super flashy versions of those base weapons.
Source: Eurogamer Signature Weapons for Call of Duty: Black Ops 4 revealed