According to MRStep¹, a total of 22 states have already declared, are currently in the process of declaring, or are planning to declare sovereignty.
Montana is going one further and considering a bill that would declare firearms, firearm accessories, and ammunition that are manufactured within Montana and never leave the state to be exempt from applicable Federal laws and regulation. For the purposes of the bill,
"Firearms accessories" means items that are used in conjunction with or mounted upon a firearm but are not essential to the basic function of a firearm, including but not limited to telescopic or laser sights, magazines, flash or sound suppressors, folding or aftermarket stocks and grips, speedloaders, ammunition carriers, and lights for target illumination.
The bill excludes crew-served weapons, automatic weapons, and explosive ammunition, but aside from those, Montana's telling BATF to go fish.
[1] Disclaimer: I cannot vouch for the soundness of MRStep as a source. Quote a few of the commenters are pretty clearly in the tinfoil-beanie brigades.
no subject
When Montana was admitted to the Union, their admission paperwork was contingent upon the Federal government explicitly recognizing a right to keep and bear arms. "The people on Montana will join so long as..." sort of thing.
During the time when Heller was up in the air, some Montana politicians were seriously talking about seceding from the Union — for nonadherence to contract — if Heller came down on the government's side.