Convert your 9mm Glock down to an Advantage Arms .22LR so trips to the range don't break the bank. Or if you want to teach your kid the fun of shooting but don't want him/her to start on the 9mm, a conversion kit is a great learning / training tool for your collection without the noise and recoil. The LE series is meant to fit Glock 17, Glock 17L, Glock 22, Glock 31, Glock 34, Glock 35 and Glock 37 full size Generation 1-3 frames and includes one 10 round magazine, pre-assembled slide/barrel assembly, a loading tool  and a padded carry bag.  It's the perfect tool to work on your muscle memory or to have some fun with your 22LR. Since it mimics the parent weapon, controls, muscle memory and general familiarty make this a practical and fun kit.