The only thing that changes by state is what non-lethal superficial attachments are available, and how many rounds you can load at one time.
What about gun shows? Just curious. I own a few firearms myself.
The extreme vast majority of sellers at gun shows are extensions of retail outlets, meaning the exact same stuff applies. Even the ones that aren't are severely restricted - they have to be a citizen of the state the show is in, they have to have documentation proving they own the firearms they intend to sell, they have to submit to a background check to open their booth, and they can only legally sell their firearms to citizen of the same state without getting another vendor to take possession of the firearm and set up a transfer to an FFL dealer in the purchaser's home state.
The 'gun show loophole' leftists love to throw out is so rare, it's almost a statistical anomaly.
Do you have a source for "the extreme vast majority..."? In my quick glance at Google it seems there ARE a lot of private sellers, and they aren't held to the same standards.
Federal law and personal experience at gun shows. Private sales without a background check are only legal anywhere in America if the buyer and seller are citizens of the same state, AND the sale is in said state. Literally every other gun sale in America requires an FFL dealer to do a background check on the seller. ---
'It's okay that those gangbangers stole all my personal belongings and cash at gunpoint, cuz they're building a rec center!' - OneTimeBen