Here is one of a kind. It is not mine, but I have handeled it. My mentor and friend Duke Duvall, now deceased, had his brother in law, Al capone , who used to own kings gun works in Los Angeles, build it up. It is a colt SAA, converted to .22 lr. The clyinder is sawed in two with the front stationary, showing .45 holes, as the front of the barrel shows a 45 hole. However a 22 barrel goes through the front of the clyinder and a .22 clyinder revolves behind it. As you can see, it has the rare longer grip frame. His daughter, a retired deputy still owns it. The gun was on the cover of guns magazine about in the late 50s or early 60s.