No point, a question.
I'd suspect kids would take guns to 'be cool', show friends, make threats without intention to actually use them. Also, intention to harm that wasn't followed through; intention to defend themselves if threatened; other reasons?
Probably no sound stats, but I'm curious about it, so asked.
Considering the slices of the socioeconomic ladder mostly involved here, I'd bet that "it won't grow legs if it's on me" dwarfs all other motives for bringing guns to school.