The Smith & Wesson Model 500 is a five-shot, double-action revolver produced by Smith & Wesson, firing the .500 S&W Magnum cartridge. It is built on Smith & Wesson's X-Frame which was developed in response to the higher output of the .500 S&W Magnum round which none of the other frames could handle. The Model 500 can fire a bullet weighing 350 gr ( 22.7 g; 0.8 oz) at 1975 feet per second (602 m/s) generating a muzzle energy of over 3,030 foot-pounds force (4.1 kJ). It is often described as a "Hand Cannon."