There are no instructions on which stop to use. I picked the one with the slightly shorter stop pin (closer in length to the 9mm stop) and it seems to work fine.
So I carefully filed the adapter rails and then polished them with some 2000 grit sandpaper. The adapter fit is good but it’s surprisingly difficult to grasp and rack the slide when the hammer is depressed, due to both the small surface area to grasp and the stiff hammer spring. Once the hammer is back the slide is much easier to operate.
I also have considerable difficulty removing and reinstalling the .22 slide stop. I need to use a pin to push it through whereas the 9mm slide stop can be pulled by hand once it’s flush with the frame on the other side.
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