Most probably the most anticipated M4 Gas Blowback Rifle this year (before the Marui version gets officially released), Marck of Hong Kong Off The Grid (HKOTG), gets to visit the WGC Shop Showroom upon invitation to check out the GHK M4 Gas Blowback Rifle. Other reviewers who have gotten their hands on it are very much impressed and will it impress him too? Watch the video below: