Marine Corps (USA)
A classic American weapon, the Ka-Bar sums up what special forces usually look for in their blades. The Ka-Bar originally came to be when Marines in WWII found that the knives they were issued didn't meet their needs. Even when they were good for combat use, they didn't do their job as tools. In reality, special forces use blades for many purposes, not just fighting. The Ka-Bar was designed to preserve the lethal elements of previous weapons while also working as wire cutters, crate openers, and just about everything else a Marine needed a knife for. Just like a special forces soldier, it does a lot of jobs, and it does them well.
Civilian equivalent: $59.95
Joe Oliveto is a staff writer for Supercompressor. He can barely handle a kitchen knife. Follow him on Twitter.