Ever wanted to do your PolarStar Airsoft conversion for your AEG? Here's a video howto done on an M4 CQBR from VFC. Check if the same method can be done on your own M4 AEG... "In this video Jordan shows just how quickly you can have a Fusion Engine installed into an AEG body. The rifle used is a VFC M4 CQBR (E Series). No modifications were done to the body."