This full metal AEG by Dboys is a full sized replica of the M16A4 used by the US Military. This AEG delivers the high performance that we have come to expect from Dboys. Of course, the entire body is made of metal. The reinforced gearbox and gears are full metal as well making this rifle very reliable. The full length RIS gives you plenty of real estate for adding accessories to this rifle. The carry handle is also removable to reveal a weaver rail for adding an optic of your choice, should you wish to do so. The full length barrel makes the rifle more accurate than the standard carbine length rifles that most players use.