Brief presentation by Airsoft Master of the G&G ARP 9 2.0 AEG that they have available at their store... "The G&G Armament ARP9 2.0 is the successor of G&G's original ARP9. Made with a durable 9mm polymer receiver and easy flip-up front and rear sights, the picatinny rail on the upper receiver can accommodate a wide range of optics and rail accessories.