Smith & Wesson(R) built the Performance Center(R) Model 640 Black as a compact revolver designed for concealed carry and serious defensive use. This 357 Mag configuration features a 2.125 in stainless steel barrel with black E-100 Cerakote(R) finish a black finished stainless steel frame and a concealed hammer design for snag-free draw. Its tritium night sights full moon clip-ready cylinder and double action only trigger make it well suited for personal protection and back-up carry.Key Features357 Mag double action only revolver with 2.125 in stainless steel barrel and black E-100 Cerakote(R) finish.Concealed hammer J-Frame design for snag-free carry.Black finished stainless steel frame and cylinder cut for full moon clips.Tritium front and rear night sights.Compact Performance Center(R) carry configuration with black synthetic grip.Smith & Wesson(R) has a long history of building firearms for sport training and personal defense with a focus on practical performance. The brand is known for consistent manufacturing standards and designs that balance reliability ergonomics and value. From rimfire trainers to duty proven platforms Smith & Wesson products are built to support shooters across a wide range of uses.