This is a good video to watch as we see Kultabashi, who is probably the best airsof sniper in the Philippines, using a KJ Works M4 Gas Blowback to take out some OPFOR at KM. 14 skirmish site in Southern Manila... "In this clip, an INTERNALLY STOCK KJWorks Tanio Koba M4 Gas Blow back Rifle was used. The only Upgrade part was the Steel charging handle, and its External Accessories, including the Scope. Using Green Gas and .30 BBS... this rifle was able to match the Accuracy and reliability of NON Gas Blow back air soft rifles in its class.