I recently mounted a ADE reflex sight on my MDm-9 with 3.8. Removed rear sight and used a Outer Impact mount. So much easier when being an old fart with glasses. Reflex really work great. Hits what the dot is on. Won't use one on my carry though. Too bulky when carrying concealed. Plus, you have to turn it on when using it. Not the best when you are in a hurry.