A comparison by BB2K Airsoft of the gas blowback and AEG versions of the HK416A5 from two airsoft manufacturers... "I'm taking a look at the HK416A5 from VFC and Arcturus with you today. Both are Umarex's premium products in terms of 416 airsoft. From the outside they hardly differ but in their drive type. The VFC is a so called Gas Blowback and the Arcturus is an electric driven HK416A5. What should one buy? What are the advantages and disadvantages? Reason to start a comparison between GBB & AEG. I wish you a lot of fun."