Question that I haven’t answered searching, at least not yet. The rail section here is removable, correct? What are you left with when you remove it?
I’m curious because I’m probably going to have substantial neck flexibility limitations following this surgery (four level cervical vertebrae fusion.) If if were to get one of these, sighting plane height might become an issue.
Edit - it looks like you have a gaping hole? I looked at @fatdog’s link again and saw the RDS adapter he used.