I purchased a rifle from a WA dealer and had to shipped to my FFL in ID to do the paperwork.”
And if that rifle was not legal in Idaho your FFL could not have given it to you. Right?
They really can’t stop it. Under the Gun Owners Protection Act passed back in the 1980’s I could go to PA and buy a rifle, throw it in my trunk and drive back to the northeast legally, even through states where that rifle may be banned.
Sure, but that's why I moved to Idaho. If it was a Class III, I would have to finish the paperwork with the local sheriff and pay my $200 ATF tax. It was a simple bolt action. Just a model that was in short supply, so I had to go out of state to find someone with product in stock.