@airsoftmaniacman and @TheRussianSniper - The polarising glass doesn't protect at all. If you've got these types of polarising glasses you see that the plastic is soft and really thin. I use a piece of plexiglass in the old rubber EOtech cover, the one that came with the meshes. You do need protection for the reddot. I've already lost 2 pieces of plexi to bullets, thankfully not the reddot.
I don't have any polarised glass on the back. You shouldn't really have two polarising sheets because you might get the polarising effect in both directions of the light --> total darkness. Experiment with two sheets and see what I mean. @Tupp9 Adding just one polarising sheet does make it darker but its better than having "killflash" meshes which makes it more difficult to see the bullets.
As for nullifying the reddot, I still see mine clearly. I don't think it has an effect because the light inside the reddot bounces internally.
I don't have any polarised glass on the back. You shouldn't really have two polarising sheets because you might get the polarising effect in both directions of the light --> total darkness. Experiment with two sheets and see what I mean. @Tupp9 Adding just one polarising sheet does make it darker but its better than having "killflash" meshes which makes it more difficult to see the bullets.
As for nullifying the reddot, I still see mine clearly. I don't think it has an effect because the light inside the reddot bounces internally.