Back up Iron Sights for SpecterDR

I foolishly let the sight screws loosen. Perhaps the company could put a dot of thread locker on the screw during assembly. I put a little on the tiny screw that holds these sights on. Do wish the screws were at least one diameter wider and a touch longer. After going through the sight base only a few threads even engage but the screw is a very hard steel so I could put a little torque on it.