LG-305 laser sights for the wildly popular Smith & Wesson J-Frame revolver line feature an extended grip length over the LG-405. Featuring a front activated laser that is engaged instinctively when the revolver is held in a natural shooting grip, the LG-305 is manufactured with a rubber overmold material over a polymer base and is among the most popular Crimson Trace Lasergrips applications. Lasergrips Fit: Smith & Wesson Airlight, Airweight, Bodyguard (Except Polymer-Framed Models) Chief's Special, Centennial, Laydsmith, Models: 36,37,38,49,60,63,317,331,332,337,340,342,351,360,442, 637,638,640,642,649,651,940. Round Butt Only.