The upcoming GHK M4 Gas Blowback Rifle is shown in this video made by TAF Airsoft during the Chinese New Year Celebration. This is the prototype but given the reactions by those who tested it, they are much impressed with the recoil action of the GBB-R. Will this be the most hard-kicking M4 GBB-R in the market when it gets released? Your guess is good as ours.