This Classic Army M15A4 RIS is more refined than the previous M16A3 series from classic army, both internally and externally. The RIS carries the same collapsible stock as found on the standard M4 series from Classic Army. The battery is housed within the fake PEQ box attached to the rail system. The AEG comes with a 300 round high capacity magazine, metal flash hider which can be unscrewed for installation of a 14mm reverse threaded silencer. The dust cover can be flipped open to reveal the hop adjuster wheel and Armalite markings are engraved on the metal body.