G&G ARP556 Airsoft Rifle 5″ CQB MLOCK RailThe G&G ARP5556 is a unique and exciting entry into the CQB M4-style rifle AEG category. Extremely compact and lightweight, from afar the ARP556 resembles a traditional M4-type rifle. Based on the G&G CM16 series of AEGs the ARP566 retains all of the features favored by players but in an SBR form. Using the traditionally solid G&G gearbox, paired with their inline MOSFET, the ARP556 puts out all of the same performance of a CM16 M4, but in a compact and unique package.