Joe, both my Luigi cases are made to accept an M-grip already installed. I always keep my M-grips on my M6 and M3, mainly because I often use a 90mm 'cron and find the leverage useful. Luigi makes them so they wrap nicely around the plastic grip, and they really feel good and solid when using, but can't be used without the M-grip, so not a good idea unless you always leave your M-grip on the camera like I do. The cases have a stepped inner floor to accept the bottom of the M-grip, so are bit taller than usual, almost like you have a Leicavit on the camera.