Laser sights for the popular Smith & Wesson J-Frame revolver line feature a hard polymer surface that is rugged and well suited for personal defense. Fits S&W Airlight, Airweight, Bodyguard (Except Polymer-Framed Models) Chief's Special, Centennial, Ladysmith, Models 36,37,38,49,60,63,317,331,332,337,340,342,351,360,442,637,638,640,642,649,651 and 940 Round Butt Only.