Upotte!!

At Seishou Academy, girls don’t just wield guns— they ARE guns! In a school where every girl is a lethal weapon gunning for the chance to get their own personal serviceman, more than a few shots are about to be fired between Funko and her classmates. And when their newly recruited human instructor, Genkoku, arrives, he’ll have to learn how to deal with this living arsenal of high caliber cuties if he doesn’t want to get caught in the crossfire of their hair trigger tempers!

Official website :http://ch.nicovideo.jp/upotte