It’s compact, light and easy to mount by simply pushing out, and replacing the stock pins with the new screws (included). Then, push the ergonomic activation button with your index finger and the laser is on target. The design also allows it to be a finger guide for safe trigger control without blocking the laser beam. The programmable laser features a pulse or constant-on mode and has an automatic-off function to prevent battery drain. Even with the laser mounted, your pistol will still fit in virtually any nylon pocket holster. Avaliable: Ruger LCP, Ruger LC9.