Any SIG sights will fit. Before I sold mine to my buddy I was able to shoot 3" at 25 yards while standing. Never benched it, but would think that it would shoot better from a rested position. The trigger on the Np22 smoothed up after 1k rounds to be about 1lb lighter than my SIG P226 trigger after 5k rounds. The Np22 are nicely made pistols at a good price.