You're probably right Paul, however, I have one that needs to be shipped to a private party. I had a run in with local USPS people about shipping a rifle to a Gunsmith (can't mention his name) and was told no. So I found some background info and gave a copy to the Postmistress and after a phone consult with one of her superiors, I was allowed to ship.
Brad; thanks for the info. I don't know of many air guns that shoot <400 fps. All mine are around 900~1200 fps. Guess I'll go back to the Postmistress for round deux.