Pistol

This handgun has only appeared in the GTA 6 key art, being held by one of the game’s two main protagonists, Jason Duval.

As such, the weapon’s actual in-game model has not been revealed.

It is possible that this is Jason’s preferred firearm but, if that is the case, it’s worth noting that it’s not the same one he is shown using for the robbery of Uncle Jack's Liquor in Trailer 1.

On closer examination, the gun appears to be modeled on the real-life Taurus PT92AF, a semi-automatic 9mm pistol that originated in Brazil.