Enhanced Upgraded version, Newest addition, all new upgraded JG M4. code name:JG-F6604. JG factory newly designed upgraded version, now included higher torque motor, higher precision metal gear box, M120 spring, integrated one piece tightbore barrel for increased shooting accuracy and initial starting speed. New design performs excellent and high durability and putting this M4 to the next level of perfection in airsoft. First batch come in to US. JG M4 is a Marui Clone A.E.G (Black) the finest made Electric Airsoft Guns by JG. This JG M4 is an excellent clone of Tokyp Marui's JG M4. This AEG feels heavy on hand; most of the easy wear parts are made with metal. The upper and lower receiver are made in ABS. Both the front and rear sight are made in metal; very similar to Marui. The flash hider is nicely made in Metal. When we check the gear box, its a nicely made metal gear box, with m120 spring. It shoots 410-420 fps with 0.2gbb, 500+ fps with 0.12g ! This JG M4 featuring New design metal gear box, M120 spring, 300 rounds high capacity magazine, included battery and charger. Please notice Orange tip is installed, although pictures might not shown. Unbeatable Quality, unbeatable price.