Shot my new AR for the first time today. The YHM iron sights front and back have to be retightened every so often because they become loose. Anyone else have this problem or should I just tighten them as hard as I can? Perhaps it just needs to be broken in on the rails.
tighten them with a flat head (if they have the necessary slot)...that's what it's there for.....if that doesn't work you can alway apply a SINGLE drop of BLUE loctite thread locker....