The 556 version of the G&G ARP series, the G&G ARP556 PDW AEG is available at Gunfire and is featured in their "Instant Airsoft" series... "At first glance, the replica resembles yet another AR-15 replica, but aside from the implementation of gearbox V2 or the pistol grip, the similarities end there. We get a solid, compact PDW replica. In comparison to a similar replica - ARP 9 from Combat Machine series, ARP 556 was made almost entirely of metal.