Crimson Trace Corporation Hi-Brite LaserGrip, Fits Compact Smith & Wesson K, L-Frame Round Butt, Rubber Overmold 01-1180 LG-306 laser sights for Smith & Wesson K & L-Frame revolvers feature a comfortable rubber overmold on the Lasergrips(R) that is slimmed down for concealed carry ease. The laser activation switch is located in the front of the revolver" making activation instinctive when you assume a normal firing grip on the revolver.