With the Advantage Arms® Conversion Kit, you can shoot inexpensive .22 LR ammunition with your Glock handgun. With the installation procedure taking just 10 seconds, you can save up to 25 cents on each round fired. Just think, you will pay for your Advantage Arms Conversion Kit after firing just two bricks of .22LR ammo! This is a great tool for teaching women and young adults how to safely shoot a pistol without the intimidation of larger calibers such as .9MM and 40 S&W.