Bathrobeman
.270 WIN
I took my Mav 88 out of the closet and carried it down a dark hallway. Guess what, the bead no longer lights up. It's a Meprolight, and I don't recommend. I emailed Mepro asking if there is a warranty or not. It was/is kinda crappy to begin with. When it was threaded all the way down to where it was snug, the part that lights up was 180* out,(so the light was facing the wrong way) and the threads protruded into the barrel. So I had file a few threads off so it wasn't sticking in, and I had to use Loctite so the bead was facing the right way. On top of all of that it was pretty dim.
https://www.amazon.com/Meprolight-ML-34044-Mossberg-Tru-Dot-Night/dp/B000U62QE2
https://www.amazon.com/Meprolight-ML-34044-Mossberg-Tru-Dot-Night/dp/B000U62QE2