Peter Stahl in Germany made a .22 conversion kit for the High Power. I got one before my son was born and he is 26 now. Actually, the kit was sold by Pachmayr. Also, a kit was produced by FM (that is right M) in Argentina. I think they were sold by Dealers Warehouse but longer available. You might want to search the used market for these. The Stahl unit is great no problems with it. A number of years ago I contacted Stahl (I think they are still in business) about extra magazines. They said they didn't make that unit anymore but I kept bugging them and they came up with ONE magazine that looked like it was rattling around in a parts drawer for twenty years but after cleaning it, it works.