Aus 4 or 6 on most of the M16 line but I'm convinced the cheap ones that were sold at walmart had some sort of crappy mystery gerbish type metal that holds an edge about as well as a bar of soft aluminum. I love the form factor but hate the lack of edge holding on that knife. I have the big brother with the spear point blade, better steel and holds an edge for my uses.
CRKT needs to step it up to be competitive today. The steels they use for the prices are atrocious. $20 for an AUS-4 knife, when you can get an AUS-8 knife for the same price is just dumb.
I should also note that their heat treat for the majority is really soft, too soft to get the maximum performance from the steel.
I have seen one single CRKT that I liked, and that is the Ripple. Good steel, good hardness, superb opening, and good F&F. But even a blind dog can find a bone.
The Wal-Mart one is actually the one I liked, the aluminum gives it a nice light feel. I just didn't like the price, and I feel like I should have gotten better for $40, but I'm a deal snob.The ORIGINAL Ripple framelock with IKBS and Acuto+ steel is good. The machining of the SS frame is very good. The grinds are even and well finished. Idunno about the new Wal Mart bubblepack Ripple. If I had to guess I'd say it's lower quality.
Appreciate all your info, but I should have been more detailed in my first post. The M16-04Z I have does not have the auto-lawk feature and has an open pillar design on the handle. Got it about 4-5 years ago. Is this still AUS4?