More updates to the Jing Gong product line as seen at RSOV.com. They have a new Jing Gong Full-metal M4 S-System. We would assume that this is in the new tradition putting in the MOSFET to their full-metal line up. This costs US$151.99... "'JG' - Jing Gong full metal M4 S-System AEG with the plastic forend and metal body, come with battery, charger and magazine."