Surplus / Used Ontario Knife Company OKC 3S USMC Combat Knife. These are authentic used knives and have an amazing amount of character - some blades have rack numbers written on the scabbards others have other unique identifiers. Own a piece of modern history. The item "Ontario Knife Company OKC 3S USMC Combat Knife / Bayonet AUTHENTIC SURPLUS" is in sale since Tuesday, October 12, 2021.This item is in the category "Sporting Goods\Hunting\Knives & Tools\Fixed Blade". The seller is "ilikebmxbikes" and is located in Novato, California. This item can be shipped to United States.