With the MI mount, the TRS-25 won't co-witness. Actually, you can't see the rear sight, but since the mount is easily removed, if I want to use the iron sights the mount/RDS can be removed.
With aging eyes, iron sights can be difficult at times, so that is why I wanted to add a RDS to my WASR.
"The Marines I have seen around the world have, the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps. Eleanor Roosevelt, 1945"