The Crucible Industries Titan-500 is a five-shot double-action revolver chambered in .500 S&W Magnum — the most powerful conventional handgun cartridge in production. The frame is investment-cast stainless steel with integral compensator ports in the barrel that redirect muzzle gases upward to counteract the cartridge's extraordinary recoil. Even with the compensator, firing the Titan-500 is a physical event that requires both hands, locked wrists, and a firm stance.

The .500 S&W Magnum round was designed for a world that no longer exists — specifically, for hunting large dangerous game in wilderness that has since been developed or abandoned. In GLMZ, the cartridge's original purpose is irrelevant. What matters is that the round delivers energy levels normally associated with rifle cartridges from a handheld platform, making it effective against targets that shrug off conventional pistol calibers: heavily augmented individuals, improvised armored vehicles, barricade materials, and the rare biological threats that inhabit the peripheral wastelands.

The Earthquake is an absurd weapon by most reasonable standards. It is too heavy for comfortable carry, too powerful for most encounters, and too slow to reload for sustained engagements. But for the specific situations where nothing else in a handgun will do — and those situations do exist in GLMZ's margins — the Titan-500 is the answer to a question nobody wanted to ask.