I love my 5.45x39 rifle, and I don't miss my old 7.62x39 rifles. BUT my Norinco rifle was the most accurate AK I've ever fired. I really should have kept that rifle.
There are videos on YouTube of guys throwing ammo cans in a lake for a year, and the GI ammo can was fine. the other can, not so much. If you want to put the gel packs in there that's fine too, but I really don't think you'll need them.
Make sure they go after all of the parents who bought their kids the bullet proof backpacks 1st. And while they are at it, any BLM or ANTIFA with a bullet proof backpack/ body armor should get a mandatory minimum of 5 years in jail.