There are adjustable sights that fit the existing dovetail of the Mil Spec available from Brownells. You're better off buying your sights as a set to insure both sights are the proper height. If your front sight is tall enough, you could file it down enough to bring your POI up to POA. The Bo Mars require a machining operation on the slide for installation, that might be a bit expensive for your Mil Spec. If it is shooting extremely low, you might have a gunsmith look at it. Could be a barrel fit/ link problem. Good luck!
Savage