I have a Colt .22 conversion that I use on my Series 70 Gold Cup frame. The Colt's have a floating chamber so they will recoil somewhat like a .45 ACP. The floating chamber requires plated .22 ammo, so I usually shoot bulk Remington or whatever from WalMart. Mine has adjustable sights.
I've had a Colt conversion for several years (bought it new), but haven't fired it for some time until ammo prices started up. It's like a new-found toy now, and my shooting pals & I really enjoy it. The Colt conversion is great, because it locks the slide back when empty: the same manual of arms as the gov't model.