Here's a nice update from Public Enemy regarding their projects from Hephaestus. There are two videos below taken from the Hephaestus Facebook Page that features their AK Tactical GBB Design that seems to be full metal. The nice thing to see here is the good recoil simulation with the GBB is being fired and really sure is fun to see since you see two bolt areas. Now which is the functioning one, better watch the videos to find out.