For the rear sight, I recommend the Sweat-On Base with the Forward-Slanting Fixed Rear Sight. (Both of these are inexpensive, but that’s not my fault.) When they’re installed, your gunsmith goes to the range with your rifle, the ammo you’re going to use, and a file, a hammer, and a drift. He will cut an aiming notch in the sight blade and tap it into position, right or left, for windage. Then it will not move, ever, which is what you want. Have him regulate it to shoot dead on at 50 yards; that’s about the maximum range at which you’ll use it.