In all my years of playing airsoft. I have seen and used some awful gear. With that being said.This quite possibly is the worst airsoft gun i have used in a long while.The Cybergun/VFC FNS9 broke my heart. Why you may ask?
That slide release mechanism is the same one that is used on the SIG P226/8/9 series - once you get the knack of it, it's easy enough. You just have to know to line that slightly circled cutout in the slide up with the lever when reassembling.