Sorry if this is more clutter, but I thought this was interesting enough to warrant its own thread. My buddy's an officer in a guard unit in another state.
The NG cannot confiscate firearms from citizens. That's not their job, that's a law enforcement function.
The NG would be conducting searches in concert with the local police, as a kind of auxiliary. They'd have the trucks and tags. I would assume that the law enforcement officer on hand would confiscate the firearm, which would then be tagged (yes, this is SOP, and this is also training for the troops.....when you take a firearm, documents, etc., you tag with details-it's for intell purposes normally, here, for chain of custody), then given to the NG, who would put it into a truck with other weapons, for transport to a secure position for processing.
The NG is quite limited in the scope of their freedom.
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When we see the guard, we assume military occupation. But in fact, unlike the 1860s, the Guard is cooperating with local authorities and augmenting their strength, not replacing that authority.
I have to admit it, the Guard is respecting the authority of the corrupt mayor and anti-gun cops.