Originally Posted by L473ncy
For sure pic #1 is a RDS cover for a Docter sight. I've seen that come with some ACM docter sights.
But my point being that it's not just the cover....it's also the actual RDS Docter Sight...
EDIT: You can tell by the sight adjustment screws on the back and the fact that the mount is there....the hood only covers the top, front, and sides. Trust me, I have one that looks identical to this one. This is the sight itself (with hood). However, the real way to tell is to just pry off the hood. It snaps in just in front of the mounting bracket screws.