The Montana legislature actually passed a bill recently stating that guns made and sold in Montana are not under the jurisdiction of the federal government, and therefore not subject to federal gun laws. Yes! God, I love those folks. They are so in-your-face with the feds.
They are actually trying to get their laws in front of the U.S. Supreme Court to solidify states rights. They actually SAY that in the open. To its credit, Texas did this to some degree before the Montanans (yeah, baby), but the Montanans are flat-out dismissive of the feds.
Here's a great story on what they're revolutionizing in the great state of Montana!