It is a common myth that just being in the military or just being a law-enforcement officer allows you to buy, own, and carry automatic knives. It does not. Under the Federal Switchblade Act, LEOs and soldiers may buy autos only if they are the official supply officer for their agency/unit and if the knives being purchased for the agency/service and for offical use. Soldiers and LEOs may not own personal automatic knives under the Federal Switchblade Act, only their agencies or services may. And LEOs and soldiers may keep and carry automatic knives only in the line of duty.
Keep in mind that the Federal Switchblade Act only applies to interstate transportation. State laws differ from state-to-state and some do permit private citizens to purchase, own, and even carry autos. Oregon does. So, it's legal for me in Oregon to own a Microtech Halo, for example. There's just one problem: The Halo is made in Florida; how are you going to get it to Oregon without interstate transportation in violation of the Federal Switchblade Act? The answer is: I don't know and I don't care to know. As far as I know, Microtech as prefected the Startrek transporter beam and all of MT autos in Oregon got here that way. That's my story and I'm stickin' to it!