
http://www.opticsplanet.com/burris-mount-fastfire.html
Its a nice look. IMO
It wouldn't be Co-witness but I find Airsoft gun steel sights not accurate after some yards anyway. Also this set up still allows for Serpa use.
Not sure how knock off RMR red dots would survive on a blowback though.
Wait, M93r with triple burst/auto? You don't need a red dot you need a Cmag.

My two sense...
Check out the RMR pic here...
https://www.facebook.com/Official.Chris.Costa
on a glock...