When I was in JROTC many years ago, I was also on the drill team. Not sure what weapons they use now, but then the guys had M-16s, and they were real, only they could not shoot. But at the end of drill team practice, all of the weapons had to be accounted for back into locked storage that the commander (teacher) had. And you didn't go wandering around on campus with them either. Sounds like the JROTC commander needs to have a good discussion with his troops.