all other fraction have a second (better) mortar on BR IV / V - except Japan. So I suggest the “Typ 97 8cm mortar”. Because russian and german mortar with caliber 8cm / 80mm are BR V, this also could be a BR V.
And because I didn’t forget the US / UK I also made a suggestion New mortar for US BR V - 81-mm-Mortar M1 - Suggestions - Enlisted for them, because the BR IV mortar have “only” caliber 60mm.
