1. Installing rear sights. I just got some sights from Ridge. Now I got some screws but um. There seems to be no taps on the receiver cover. Is there something that there is also supposed to be that I don't have on there? :S
  2. There is two rectangular plates with two holes each tapped for what I believe to be #4 threads. Those fit inside the cover.

  3. Yeah, you have to remove the receiver cover to mount a different sight/scope. At I have to on mine.
  4. Oh my. Well, looks like I shall be calling hi point and telling I need some of those.