I got my Assassins Creed Gauntlets from GameStop finally. They've been on Backorder for so LONG!
Left - Blades in place
Right - Blades unhatched
...The blades are connected to a spring so they fly out after you hit that button at the bottom. The blades are made out of rubber so they are con approved.
I'm going to be wearing these for my AC cosplay for Katsucon 2013!
I love them so much!