Originally Posted by El Fumador

Yep had to file the sides. I did a little at a time on each side so as not to wear down one side to much. It's a very small screw, I used loctite on the screw.
To get the screw to catch I dabbed some glue on the screw top and stuck it to a wooden skewer for a minute or so to start the threading. I already had the socket size needed to tighten it. I'll check what size and post it up in the am.


3/16th socket. On a sidenote: The Hi Viz sight I installed is metal.