The LaserMax series of Guide Rod Lasers is an essential tool for training and self defense. The laser not only increases your ability to achieve hits under stress but it also allows you to have a point of reference for aiming under stressful conditions. The Guide Rod laser system can be easily inserted into the firearm by replacing the factory spring/guide rod assembly with the LaserMax version. This is done without any permanent alteration or modification to the firearm. The distinct ambidextrous on/off switch can be used by left or right handed shooters.