aRick of Public Enemy is now back from Taiwan and his new video shows that his GHK AK Gas Blowback Rifle has a new feature installed by Hephaestus. This is a left side selector switch, similar to Galil rifles, which makes it easier for you to put the rifle from safe to fire modes, and vice versa. It's not a standard feature in AK rifles so don't expect to be coming out from GHK.

If you want this in your GHK AK GBB, according to Public Enemy, you'll need to contact Hephaestus to have this installed.