Advantage Arms Conversion Kit: Convert your 9mm/.40 S&W Glock down to 22lr 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. The MOD series is meant to fit Glock 19/23 Gen 5 and includes two 15 round magazines, a 4.02" threaded barrel, a range bag, and a recessed cut for a variety of red dot options. Its the perfect tool to work on your muscle memory or to have some fun with your 22lr can. Red Dot Not IncludedFeatures :Glock Style SightsOptics ReadyThreaded BarrelLast round lock open30 second installation1 year factory direct warrantyComes with range bag