Advantage Arms Glock 17/22 Gen 3 .22 LR Conversion Kit w/10-Round Magazine and Range Bag, 4.49 inch Barrel, Black, AAC17-22G3

40 S&W Glock down to 22 Long Rifle so trips to the range dont break the bank. Or if you want to teach your kid the fun of shooting but dont want him/her to start on the 9mm a conversion kit is a great learning / training tool for your collection.