Laser sights for S&W K & L-Frame revolvers feature a comfortable rubber Overmold grip that provides ideal comfort and security for large caliber revolvers. The laser activation switch is located in the front of the revolver's Lasergrips for instinctive activation when you assume a normal firing grip on the revolver. Fits S&W Models 10 Through 19,48,53,56,64-68,242,296,386,396,547,581,586,617,647,648,686 and 696.