The Smith & Wesson Model 640 Pro Series 357 Mag Revolver w/Night Sights, Display/Open Box (Model 178044) combines classic design with modern enhancements for superior performance. This J-Frame revolver, built to handle .357 Magnum or .38 S&W Special +P, features a compact 2.13" stainless steel barrel, satin stainless finish, and enclosed hammer for a snag-free draw. It comes equipped with dovetail Tritium night sights for reliable targeting in low light. Based on the Model 40 Centennial design, the Model 640 Pro integrates time-tested reliability with competition-grade upgrades, including a cylinder cut for moon clips to enable faster reloads. This revolver includes black grips and a moon clip, making it a durable, powerful choice for personal defense or backup carry.