The Wave is a little hook above the tumb disk that catches on your pants pocket when you pull the knife out in a certain way, causing the blade to snap open the instant it clears your pocket.
My problem with the Wave was that it was such a violent opening that the Commander's lock could not take it for long.
On my Commander, after about a hundred of these practice drills, the liner had slid all the way over, and the blade developed up/down play. Upon close inspection, I found the stopping pin had been slightly deformed. I feel they need to switch to a fully hardened pin that's 60+ RC. This was two years ago, so I don't know if they fixed it.
A lot more work goes into the Commander than the AFCk though, the scales and liner are all smoothed and rounded. Much better that the jagged liners found on Benchmades that eat your thumb.