Ctc Lasergrip S&w K/l/n SquareLG 207 laser sights for Smith & Wesson K, L & N Frame revolvers feature a hard polymer material that provides ideal grip security for large caliber revolvers. The laser activation switch is located in front, making activation instinctive when you assume a normal firing grip on the revolver. Features : Pressure activation Red laser Factory sighted at 50Ft . 5 inch diameter at 50 feet