From his post, the OP knows that. Rbecker, to correct point of impact 2 inches at 25 yards, a rear sight about .018" lower will be required, depending on how you see the sights, and hold, etc. The .146" should refer to the blade height. I just measured the few that I have here, and find none of that height. If that is indeed what you have, then the .126" sounds just right for correction, and will allow you to be up a click or 2 or so from the bottom.