Smith & Wesson J-Frame revolvers have had your back since 1950. These small revolvers were designed to fire a full power round and are as simple and easy to use as they are reliable. Available in various calibers and with three diverse hammer designs, it is no surprise that the Smith & Wesson J-Frame has become the most popular, small-frame, defense revolver on the market.

In 1995, Smith & Wesson introduced the Model 640, the first J frame revolver chambered in the powerful .357 Magnum round. 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 PC Pro Series Model 640 Specifications
Caliber: 357 Magnum / 38 Special + P
Barrel: 2.125"
Stainless Steel Frame, Barrel, and Cylinder
Front & Rear Dovetail Tritium Night Sight
Concealed Hammer
Cylinder Cut For Moon Clips (Moon Clips Included)
Rated for Continuous +P Use
5 Shot Stainless Steel Fluted Cylinder
Double Action Only
Width: 1.3"
Length: 6.63"
Height: 4.3"
Weight: 22.4 oz
Smith & Wesson 178044

A moon clip is a ring-shaped or star-shaped piece of metal designed to hold multiple cartridges together as a unit for simultaneous insertion and extraction from a revolver cylinder.