Funko, Ichiroku, Eru, Shigu, normal elementary school girls in a normal school, except that is a weapons school, and, in fact, they all are weapons.
Upotte is a slice-of-life story revolving around the lives of several middle school girls and their school adventures. The fact that the girls happen to be anthropomorphizations of real military assault rifles means the series centers around the analogizing of rifle components to body parts while the relatively strengths and weaknesses of the particular weapons are portrayed as personality traits, even as the show provides the viewer with lessons on modern combat arms.