Probably a Tisas, some sort of 9mm 1911
Always add some AR lowers
Some kind of 2" revolver when I find the right one
A pump action 22? (Winchester from 1930's?)
I also have been shooting it for about 10 years. Kills deer well, accurate. Easy to reload.
No issues find ammo, I hunt deer with it, so maybe shoot 5 rounds a year at most.
While you are correct those rights do not apply equally in school settings, to search without consent with no threat being reported is a massive over reach for the school (providing the limited information in the article is correct) and I predict their insurance company will be writing a check.
I say go decent but cheaper. I like the Traditions line, spend some money on a scope. I would not worry about something that shoots smokeless powder, but something that shoots Triple 7 or pyrodex (pellets are simpler) with 209 shotgun primers.
50 Cal that shoots 45 caliber bullets with plastic...