Based on Model 40 Centennial'” the Model 640 is a small frame concealed hammer revolver that packs a full-sized punch. The Model 640 Pro Series integrates the time-tested features of the original with modern advancements and competition specifications and features.
Smith & Wesson Model 640, Pro Series, Double Action Only, Metal Frame Revolver, J-Frame, 357 Magnum, 2.13″ Barrel, Stainless Steel, Satin Finish, Silver, Rubber Grips, Fixed Night Sights, 5 Rounds, Moon Clip 178044
