I was told by a worker at a particular gun store that if you have a tax stamp on a firearm it cannot be confiscated if the state imposes a law restricting the ownership of said firearm. An example of this would be if you had a stamped short barreled AR-15 and the state drops a bunch of restrictions like we've seen in California and New York, it becomes essentially exempt from these restrictions. I'd like to hear some thoughts and maybe find someone who can confirm or disprove this.