Latest from the Jing Gong M4 full metal series at RSOV.com. This one also comes with colt markings and most likely the much praised MOSFET system. These new Jing Gong full-metal series are selling like hotcakes. So get yours before it goes out of stock again, just like the M4A1 and Stubby Killer... "M4 CQB with new style collapsible stock (6624), aluminum RAS and one-piece barrel comes with crane type battery and battery charger."