This knife is serious business. Perhaps the most famous fixed blade in the entire world, the KA-Bar USMC Fighting knife was a standard issue piece of equipment for American troops in World War Two and has grown increasingly popular. Legend has it that in 1923 a fur trapper in Alaska used one of these knives to kill a bear after his rifle jammed, leading to the name KA-Bar or (Kill A Bear). For some people, this is more knife than they will ever need. But others wouldn't even consider going out into the wild with any less.