The video link was a tip from our friends from Public Enemy. Although the video is titled "GHK M4 GBB released" it actually shows a prototype of the GHK M4 Gas Blowback Rifle being tested. With the recoil of GHK GBB Rifles really good, ranging from their AKs to their G5 series, it's just about time they put this in an M4 GBB Rifle. No information on release date yet though.