He is an Operator for the Executioners faction in Vanguard and an Operator for the SpecGru faction in Modern Warfare II and Modern Warfare III. In Vanguard and Call of Duty: Warzone, Snoop Dogg was released on April 19th, 2024 as part of the "Tracer Pack: Snoop Dogg Operator Bundle" during Season Two of the game.
It is called the Forward Assist and is used in the instance of a round not feeding 100% of the way to the point where it seats into the chamber. They're uncommon and in all the years and all the various malfunctions I've had with the weapon, I've never run into an instance where it helped.