*Automatic Knives and Switchblade Auto Knife Sales Within the state of Florida. Automatic Knives are sold by Tactical Defense, Inc at it's discretion to persons over the age of 21 years old in the State of Florida. Sales to persons in other U.S. States are prohibited across State Lines except for Government Procurement Officers. More information about legal purchasing of Automatic Knives is available in the footer of this page. Florida residents please allow 7-10 days for delivery.