Sounds like a set screw, meant to be tightened and left alone to fix the sight in its dovetail.
Would suggest blue Loctite to start with.
My new 1911 45 has the Novak rear sights. In front of the leaf is a hex-head screw that keeps working out. Haven't lost it yet but it has been pretty far out a couple of times. The schematics I have seen (including the one that came with the gun) do not show this sight.
Is this screw used to adjust the windage, then tightened back down? Should I put some fingernail polish or LocTite on it? What color of LocTite?
Thanks
Sounds like a set screw, meant to be tightened and left alone to fix the sight in its dovetail.
Would suggest blue Loctite to start with.