How do you do that? There's no special handling of firearms after you declare and check them. There are no markings on the outside of your luggage telling what they contain. It's totally stealth after your initial declare, special screening and hand-over. After that part, your bags are re-mixed in with everybody elses luggage. Your bags fulls of guns just roll out on the baggage delivery carousels like every other piece of luggage. That's why you move from your plane to baggage pick-up ASAP, so you can be there right when yours comes out so nobody else can grab it first. There's nobody to refuse to.

You'd think an attorney teaching a class on such matters would at least know how the process works. But apparently not.