s&w 500

Formally the Smith & Wesson Model 500, a very-large-frame double/single-action revolver designed around the .500 S&W Magnum cartridge. S&W advertised the Model 500 as "the world's most powerful handgun" (a title formerly claimed by the company's .44 Magnum Model 29 back in the 1970s) upon its release in 2003.