Ok, understood now! I have the Advantage Arms .22 conversion kit for the Glock 17/22 on order from Glock Works. It's on back order, of course. I ordered it on May 27 this year. It costs considerably more than $200 tho! Those I have seen work well, which prompted me to order one. I have a Ciener .22 conversion kit for 1911s. It works great. The .22 conversion kits are a complete upper. It only takes a few seconds to change from the kit to stock and back. Simply a matter of removing the stock slide, replacing it with the conversion unit, and inserting a loaded magazine. Magazines for the conversion are about $30, so a good supply of mags costs more than the conversion. I think the rimfire conversion units are a good investment these days with the cost and availability of centerfire ammo.
Savage