henschman
Member
The UTG riser that gives absolute co-witness for a TRS-25 or Primary Arms micro dot is the 0.83" one. It is the one they call "medium height." I had a TRS-25 on my AR for a while and it worked great. It is now on my FR-8 scout rifle. My Dad has one on his AR as well, and likes it. FYI, the Primary Arms micro dot with fixed base is the exact same sight as a TRS-25. They just put the brightness knob in a slightly different place. I'm sure they're made in the same factory in China. I have had both side by side, and they are nearly indistinguishable.