OK Brothers, I am an FNG here.
I just purchased my Sub2000 gen 2 and did some upgrades including the rear notch sight.
Followed the video to the letter. The sight will not pop up when I open the carbine, I have to use the lever to flip the sight in place.
I have loosened the bolt to the point it is rattling, I have lubed, etc. Still will not pop into place.
Any suggestions? I am sure I screwed something up, can’t figure what it is.