That's silly. None of those things were in working (fighting) condition. You can be a war historian and think that private ownership of war implements is a bad idea.
It's also legal to equip them with machine guns, as long as the gun's transferable under the Hughes Amendment. An M2 Browning would set one back $20K or so.[1] But a guy like Paul Allen could splurge and get a GE M134 chain gun for $500K.[2]
One could also equip them with explosive ordnance as long as each piece of ordnance is registered as a destructive device (along with $200 tax stamp).
These are minor obstacles to the wealthy. Gun control is for the poor.
[1]: https://www.morphyauctions.com/jamesdjulia/item/lot-1009-m2-...
I can't see the pragmatism in demanding equivalence of regulation.