i like that. it also helps save ammo sighting in at 100yds by doing it a 7yds. i wonder how hard it is to swap out my rear sight? (dont have much experience disassembling my rear sight )
While I have not shot with one, I would be interested to see if the notch interferes with aperture. I had an A.R.M.S. #40A2 with a similar notch for longer distances, which I did not like at all.