Okay, so I really enjoy the idea of the Chef's Knife. However, in its current iteration, it can't really be used. In my experience so far, the knife is rare to find. Even rarer is a scenario where it can be used stealthily. Class-D? Why not use a gun. Maynard? Sure, but you risk your entire cover. You'd use a gun. I believe that Doomnack's original idea for the knife would be more viable in the current gun meta.    His idea: -On hit: both you and your victim become invisible