Kershaw automatic knives are among the fastest in the business. Try one and we believe you could possible see the wickedest, fastest automatic knife you have ever gotten your hands on! What makes them unique is the push button opening system that also doubles as a piston lock to hold your blade open. Smooth and fast, just how you like them. Service credentials are required to purchase automatic knives from this site. In order to purchase automatic knives you must be in the Armed Forces or a member or employee thereof acting in the performance of your duty. Even if it automatic knives are legal in your state, we still require service credentials to ship this across state lines to be in compliance with Federal Law. Below are 4 unique Kershaw Automatic Knives that are in stock and ready to ship.