Seems that I stripped out the internal hex on the set screw and I need a replacement. Stopped by the local bigbox, but they didn't have any small enough.
Couple questions, what size is that screw, and where can I find a replacement? I actually installed two of these on a couple lowers and both set screws stripped out during the install process. One didn't strip until it was just about all the way screwed in, the other stripped before it even got it started. Yes, I used the right size wrench.