The SureStrike? Premium Plus IR Kit takes the original Premium Plus Kit and adds an extra layer of difficulty by using IR instead of a standard visible laser. This can immensely improve the training value of dry fire sessions, forcing the shooter to trust their sight, picture, and trigger control without a visible laser indicator. Unlike other laser cartridges which are activated by vibration, SureStrike? is activated by the action of the striker or firing pin, which eliminates the possibility of misfires. A live round cannot be loaded in the breech, making it completely safe while training.