MUSTANG .357

The Mustang .357 is a revolver named directly in GTA 6 trailer footage, with the model name implying .357 Magnum-class performance — a caliber known in real life for hitting harder than a typical 9mm sidearm at the cost of a smaller cylinder capacity. Revolvers have historically served as GTA's higher-damage, slower-reload alternative to semi-auto pistols, and there's no reason to expect the Mustang breaks from that pattern based on what's been shown so far.