Actually, Tom, automatic knives ARE legal under federal law. In the entire U.S. Code, there is only about one section (2-3 paragraphs) about switchblades. It is a violation of federal law to (a) possess one on any Indian reservation, (b) Possess one in any U. S. Territory (e.g., Guam), and (c) ship one through interstate commerce. It's left up to each state to determine legality locally. Here in Florida, there is no mention of auto knives anywhere in the statute books.

I often carry a Benchmade Mel Pardue 4" auto with my gun. (It's legal in Florida if you have a CCW license.) I really feel sorry for you guys who live in "3" states"!

I often carry a Nealy 5" Kinzhal upside down hanging from the inside breast pocket of my suit.