Look up federal regulations on switchblades you will find the law making interstate transportation a felony. On foot by air ect. Extra crime to use post office as well. On the books from long ago, and like I said it seems not to be enforced. But I did know Robbie Dalton and he said he was persued by the FBI for just such a thing. And had to move operations to avoid them. Could have been B.S. but it came right from his lips. Used to attend Crossroads gun shows in Phoenix where I would talk with Robbie and his largest distributor my friend Jim Davis. I don’t gamble with such things. Take care.