I know they were single action, rimfire revolvers but the Single Six and it's variants are extremely nice guns. They are solidly built and accurate. Every one I've ever shot made me want to own one. I have never bought one though. I guess I'm a semi-auto guy at heart. I've tried to get a MkII away from my friend for over 10 years now but he just won't part with it. Dang the bad luck. I guess I could find another one but getting one that shoots as good as the one my friend owns is not easy to do. It may be the most accurate handgun of any kind I've ever shot. My Sig P220 is pretty good and so is my 629. But that MkII is something special.