Crimson Trace Corporation Hi-Brite LaserGrip, Fits S&W J Round Butt, Rubber Wraparound 01-1150 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(R) Lasergrips(R) applications.