U notch rear sight?
Does a U notch rear sight work on the same principle as a ghost ring, where the eye and brain work to automatically center the front sight? I’ve (tho rarely) seen old rifles with them, but it seems u could have more space to find the front sight quicke, thus cutting time down a touch in a fast draw/aim and shoot situation. May be worth an experiment on an inexpensive rear sight by gently rounding a square notch a hair; not too difficult with a steady hand and small vice. Anybody have any experience with them?