The Gunsite's blade is high-quality AUS8 stainless steel. That's really good steel, and its high carbon content is why the cutting edge can be so thin and strong but honed to a very sharp edge. It's also why the Gunsite sharpens so easily.
OK, admittedly, a lot of folding knives have blades made of AUS8 steel. But what they don't have is the Gunsite's unique blade design. The serrations feature numerous small teeth between the larger teeth, permitting the blade to cut smoothly through almost any material. You name it, seatbelts, heavy denim, rubber tubing, the Gunsite cuts through it all quickly in one pass.
Another great feature on the Gunsite is the lock. Cold Steel uses a lever lock for the blade; not the more common liner lock. The lever lock is safer to the user since you are not releasing the lock with your finger between the frame and blade. Trust me on this one, under stress I have inadvertently closed a liner locking knife on the back of my thumb. It hurts. Such carelessness can take you out of action temporarily. And worst case, you could lose a substantial portion of a digit. This is why for rescue work, I prefer the lever lock.
The Cold Steel Gunsite knife has a couple of other great features that make it a standout. For example, it has a low-profile clip. Some knife clips can catch on items other than your pocket and end up on the floor, and, if your luck is like mine, lost. I have yet to have my Gunsite pop out of a hip, front, or cargo pocket.
Another Gunsite feature that I like is the ambidextrous opening stud. Some knives require you to remove the stud and reinstall it on the opposite side of the blade. Two things can happen with that arrangement: you can lose the screw that secures the stud, or you may not tighten the set screw. Either way, you no longer have an easy opening blade; until you get a new screw from the manufacturer. The arrangement on the Gunsite eliminates that problem.