The SureStrike cartridge is the central element of the SureStrike dry fire training system. The cartridge fits directly in the firearms chamber and is activated by the impact of the firing pin to emit an eye safe laser pulse simulating the point of impact. A chamber based cartridge eliminates the possibility of loading live ammo behind it and damaging your firearm. The SureStrike cartridge works with simple reflective targets, interactive targets or can be programed to work with a variety of simulators. Cartridges are warrantied for 5000 shots. The cartridge comes with 3 reflective targets, user guide, and battery pack. Cartridges can be modified into other popular calibers by using optional adapters.