I ordered this sight in the .115" notch width to help tighten up the target picture over the stock PPQ sight. With the stock front sight post it gives a much improved (for target shooting) image and has really helped me shoot more precisely especially at 20+ yards. The original rear sight had a massive notch cut in it that worked great out to about 10 yards and gave a much faster acquisition time, however I don't need this for my application. I left the original front sight on the pistol and it seems to match the .115" cut very nicely. Did not have any vertical point of impact issues or changes and only had to drift the sight once after initial install to fix horizontal error. (as to be expected with a new drift sight) This sight allows me to now fully utilize the amazing trigger of the PPQ and create 2-4 inch groups at 25 yards easily off hand. I would highly recommend this to anyone who wants a good target sight picture with minimal gap (think S&W long barrel revolver) it really lets the PPQ shine!