Years ago, BQ pointed out that when the Depots changed to type 2 and 3 sights they were supposed to retain the flips for future possible use. Maybe there is a huge supply somewhere?
I never could understand the logic of bitching about a greatly improved rear sight? How a beat to heck, jammed in fake piece of Chinese crap was so cool to the eye and brain. A mod that completely screws up whatever the depot did to make the adjustable shoot dead on.