The JG M4 CQB-R is built around a full metal body and gearbox. The compact design features a RIS system for a variety of attachments such as lasers, lights, grips, and more. The stock is adjustable for various lengths. The rear sight is also detachable and replaceable with high end optics such as scopes and holographic sights. A 9.6v battery and standard wall charger are included with this gun.