I called and got Mark. I asked him for a new set of the factory .22 sights, and he sent me a 9MM rear sight. I don't want to use it. It's steel and I might screw it up putting it on. And the only problem I have with the factory M&P22 sight is the black on black coloring. Other than that, it's adjustable for windage and elevation, something that the 9MM sight is not. I'm gonna hold off. I'm hoping some other manufacturer eventually sells a dedicated M&P22 adjustable 2 dot sight.