In the dark recesses of my memory I kinda remember a time when AR comps were drilled and pinned to prevent removal, perhaps during the Clinton AWB. After installing the pin they were machined and polished so as to disappear. Problem I'm having is with an Armalite AR10 from that time period. Wanting to change out the forearm and cannot seem to get the comp off. It wiggles just a little but then it hits a hard stop whether going clockwise or counter clockwise. Don't think its put on with locktite. Any suggestions?