That PPSh-41 is most probably commandeered from a "KO-ed" Pravda crewmember...
That, or Yukari keeps one handy in her apparently bottomless survival kit.
By the way, which year and class is sempai from?GET'EM!!Ahh... She is from Gunma prefecture, so you wouldn't understand her?Is that so?I'm from Gunma too, should I interpret?*KER-CHAK*Read "Kampfgruppe ZBV" for the original story!From OVA V05