The Smith Wesson 637 is a small-frame five-shot revolver. It features an aluminum alloy frame stainless steel cylinder and barrel and three styles of external hammer. This pistol also offers integral front and fixed rear sights black synthetic grips and rating for continuous P use. The Enhanced Action model sports custom wood grips. The older Smith Wesson 637 has a black blade front sight and full-length extractor. Details SMITH WESSON 637 REVOLVER 38 SPECIAL 5 ROUNDS BLACK