Advantage Arms Conversion Kit, 19-23G3-MOD, 22 LR, 4.02 Threaded Barrel, Fits Glock 19/23 Gen 3, Optics Ready, Black, Fixed Sights, 15 Rounds, 2 Magazines AAC19-23G3-MOD Advantage Arms Conversion Kit: Convert your 9mm/.40 S&W Glock down to 22lr so trips to the range don't break the bank. The MOD series is meant to fit Glock 19/23 Gen 1-3 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. It's the perfect tool to work on your muscle memory or to have some fun with your 22lr can. Red Dot Not Included