Ill never have another one again. Milling the slide is a hundred times better. The rmr sits closer to the bore and is tighter to the gun. The mounting plates and screws setup sucks imo. The allen wrench that comes with them sucks too, its like its just barely too small and wants to strip out the screws so bad if youre not careful. Hated mine compared to my milled 19. Traded my 17 mos for a regular 17 to have milled.
This was my experience as well... my optic sat way to high on the MOS as the provided plates actually hindered it from getting a better cowittness even with suppressor sights....