Easy to mount on the gun by simply pushing out and replacing the stock pins with the new screws (included). Then push the ergonomic activation button with the index finger and the laser is on target. CK-AMF design works also as a finger guide that allows for safe trigger control without blocking the laser beam. Programmable laser features a pulse or constant on mode and also has an auto-off function to prevent an unwanted battery drain. Side mounted laser allows the pistol to fit in virtually any nylon pocket holster.