Strike Industries dummy rounds will let you safely test the feeding, extraction, and magazine function of your firearms without the worry of accidental discharge. They also let you dry fire without risking damage to the firing pin. SI Dummy Rounds are a great training tool for safe handling of any of the most popular firearm calibers. This will aid in keeping your fundamentals sharp and keep the cost down on practice. They are made out of polymer material so it won’t corrode or cause corrosion to any of your firearms. .