collaboration between ZT and Strider. S30V steel shaving sharp. G10 handles. 1/4" thick and built like a tank. I shouldn't have, but I've been obsessing over it. good gracious it's a nice piece of gear. ban states seem particularly freaked out about bayonet lugs on evil black rifles, so I feel a duty to utilize mine. as Hunter says, if a things worth doing, it's worth doing right.