Justin of Airsoftjunkiez does an overview of the VFC HK416 AEG. A popular AEG that is fully licensed by Umarex, he goes over the externals of the AEG, with the build that they prefer to do for their custom work. For those who want a full metal-body HK416 customised for HPA, then Airsoftjunkiez want you to consider them for your project.