All it seems to do is block my view while looking through my red dot . One of the things I love about red-dots is . when and if they fail you can use you irons right through them . No need to take it off .
This doesn't make sense. You don't like the co-witnessed iron sights when looking through your red dot, but you like the iron sights for backup.
The only way to do both that I know of is to use fold down front and rear sights and not flip them up until needed. I have a fold down rear sight and the sight picture has never bothered me with a standard front sight. My only pic of my AR: