Smith & Wesson Model 610

The Model 610 is a six-shot, double-action revolver chambered for the 10mm Auto cartridge. The 610 was manufactured by Smith & Wesson on the N-frame, similar to the Smith & Wesson Model 29 in .44 Magnum, and the Model 27/28 in .357 Magnum. The 10mm Auto is a rimless automatic pistol cartridge, so moon clips are used to hold cartridges when loading and extracting spent cases en bloc. The Model 610 can also chamber and fire .40 S&W rounds, as the .40 S&W cartridge is a shorter, less powerful variant of the 10mm Auto with the same diameter.