Two loaded models, on both the rear sight always came loose. A little green loctite retaining compound fixed that, Or you can lightly peen the edges of the dovetail. Springfield service sucks, they want you to send it back for everything and if you want advice or to do it yourself they just ignore you. They are accurate, mostly reliable, but the blue is only microns deep, a kydex holster eats it right up.
My experiance
Darren