This has been bugging me for some time. I used to have a giant and lovely picture that i could provide, but I accidentally saved over it with this pitiful avatar size. So, if someone with a good eye and knowledge of anime could narrow it down, that be great.
The gun she has it's quite long, looks like a sniper rifle. And she's in some type of military/school type japanese uniform. I figured if any group of people could figure it out, it be you guys.