Using these dry fire laser cartridges is easy. First, load the cartridge into the chamber of your firearm just like you would with real ammo. Then, operate the firearm as you normally would to start your training. Remember, these cartridges are for dry - fire training only, so never use live ammunition when using them. To keep your cartridges in good condition, clean them regularly with a cleaning rod. After each use, make sure to store them in a dry and safe place. If you have any problems or questions, don't hesitate to contact customer service.