If you enjoy shooting, need to practice more or just want a new toy check out the Advantage Arms 22lr conversion for your Glock  The Advantage Arms 22lr conversions give you the look and feel of your original handgun.  The Glock LE conversions will utilize any factory or aftermarket sights. The Advantage Arms conversion for the Glock handguns are designed to work on factory handguns. The use of aftermarket parts may cause operation issues.  This is a great training tool when you have a student who is recoil sensitive or just plain scared to death of a handgun. The only problems we  experienced has been dirt related. Like all 22lr handguns you need to keep it clean, find the right ammo and it will work everytime.