Found the Actual Site for the Knives.. - https://microtechknives.com/knife/jagdkommando/#

I like the Design. A friend pointed out, that in a Real knife like this, with the spiral blade, if the blade is fixed to the handle, when it enters the target it will twist itself out of your hand. He suggested maybe incorporating a ball and socket to the joining surfaces, so the blade can spin separate from the handle. I'm new to 3D Printing and have no real artistic talent myself, so I haven't attempted to modify the design with the ball and socket myself yet... :)

Aren't these forbidden by the geneva convention? ;)