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Dovetail Tritium Night Sight
The Smith & Wesson J-Frame has become the most popular small frame personal defense revolver on the market. With decades of reliable performance to its credit, this J-frame line offers models capable of firing .38 Special and the more powerful .357 Magnum loads. Smith & Wesson offers this revolver in the fully enclosed Centennial Model. The model 640 also features dovetail tritium night sights, a cylinder cut for moon clips, and a satin stainless finish.