Well... not sure I agree.
You're asking people who had the backing of a trillion-dollar defense establishment. That's not you and your group.
They say the "tooth to tail" ratio in the army is like 10-1, meaning every one trigger-puller has ten guys (whose job is NOT pulling triggers) in their support. There are several levels of armorers ready to help fix weapons. There are warehouses full of spare parts, which would be expensive for all of us... but not for Joe. There is a fleet of helicopters, planes, and trucks whose purpose is to haul those spares, and the techs who can install them, to anywhere in the world where they're needed.
You don't have access to any of that.
This is what I was saying earlier: "being in the Army" is no credential for being able to survive on your own for an extended period. YOU need to talk to people who've done that. Your situation won't be anything like an American soldier's situation; your situation will be more like the guys who served the warlords in Somalia, with no government support and no infrastructure. Those weapons were held together with duct tape and baling wire.
It helped that they didn't have M16s, which are known to need a lot of maintenance vs something like the AK, which you can keep running using almost anything. You should be studying those people, not US Army soldiers, and you should be carrying their equipment, not something that needs a lot of maintenance.