Don't know for the M7 but I removed the dot of my M6 once (carefull with the razor blade though, I managed to nick the black chrome down to the brass). Underneath the red dot there's an opening, in the shape of the triangle, through which you can adjust the rangefinder. The camera looked butt ugly with the dot removed, plus I am sure it would suck dust in. I was lucky enough to replace it with a LHSA black dot. I love it!