Oh well, no. I don't even want to know where Homura got that one, but I seriously doubt that the disappearance of several live grenades, Minimis, M9's and tons of ammunition will go unnoticed, or rather, unpunished. I worked at an arms storage depot for a while and you'd be amazed at the kinds of shitstorm the superiors can make out of a single handgun that got 'lost' in all the paperwork. Jail threats, jail threats everywhere.
I was thinking the same thing. It's a big enough deal when a gun randomly goes missing in the States, but that's Japan. They barely have any guns to begin with!