Apart from the fact that he is filming mostly a blank table. Once you get the frontset separate from the body, there are 2 screws holding the hopup. Just undo them and slide the barrel with the hopup out.
Great, then it's a vfc. Check that link in my last post. One thing to be careful about is if the rear sight block is not steel (check that with magnet) then it's easy to break it by turning the barrel sideways accidentally when you wiggle it out.