The small screw on the left side of the rear sight on my Mark III has come loose. Any reason not to put Lock Tight (blue) on that screw?
Thanks, Bullseye. That is what I was asking and that is what I thought.You are talking about the screw on top and to the left which is the sight base hold-down screw?
That one should have LocTite or some other thread locker sealant applied to it or it will come loose and allow the sight base to walk in the dovetail slot.