> If the purpose of private gun ownership is to empower citizens to overthrow a tyrannical government, then no registration process should be warranted for destructive devices like javelins or SAM batteries.

This is non-sequitur to me. You're describing having the ability to immediately and effectively go to war with the US military and the entirety of the federal government. That's an absolute extreme. In reality, there would be A LOT of steps before that.

I'm in the #8 camp, but rephrased more generally to something I'm sure you've heard- People should be able to own guns to fight back against tyranny. At the absolute extreme, yeah, I'll admit that that includes potentially overthrowing the government, but in reality the scale is much much smaller.

Meaning, people should be able to own guns to bolster their community's defense from both foreign AND domestic threats. The few times that the 2nd Amendment has successfully been put in practice (wrt to fighting the govt), it was against corrupt local governments completely disconnected from any kind of heavy military hardware or active personnel.

I think stepping back and thinking about what "community defense" looks like, structurally, is a good exercise. You'll find that spread out in towns throughout the country, we have caches of equipment and weapons in local armories. In a "defense" emergency, that becomes the local "military gear co-op". A person provides what they can in the form of equipment, supplies, and weapons, and fills in the gaps with the armory. Other community members who are uh... overstocked... on guns and ammo give to the armory for others to use. Again, not at all limited to weapons and ammo, but that's what I'm focusing on here for the sake of simplicity.

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Back to the extreme end- what does overthrowing a tyrannical federal government look like in reality? It doesn't just start out of nowhere with large scale conflict with the US military. It starts with balkanization, communities isolating, picking sides, pooling resources.... over time increasing violent attacks turning into gun fights, spread throughout the country. By the time a direct open conflict starts with a state or federal government, there is no single State or US military, there is no rule of law, and heavy military hardware is spread out among factions.

So while the 2nd Amendment might not be interpreted to mean "Your right to a SAM battery is constitutionally protected", if the extreme purpose of it becomes reality... you'll get your private SAM battery.

One last edit:

A non-exhaustive list of Things I think the 2nd Amendment (or the philosophy behind it) specifically protects:

- An infantryman's personal weapon (infantryperson? community defense is everyone's responsibility) and all equipment/accessories needed to maintain and operate it.

- Typical survival gear: backpacks, boots, mess kit, knives (bayonets! not just for stabbing; they're often multi-function tools), tents, etc

- Typical protective gear: helmets, ear plugs, goggles, body armor/plate carrier

Taken from my nowhere-near-complete understanding of contemporary gear. In 200 years, replace "rifle" with "phased pulse blaster" and "body armor" with "personal energy shield" if we're still stupid enough to be going to war with each other then.