Built this myself and never used it. It is a Gen1. Put pretty much every Zenitco part on it I could find. Comes with the stock mag and 4 PTS Palm mid-caps. Batteries are also included but the light is not. Please contact me with any questions. Upgrades: Zenimei Full Length Rail Handguard Zenimei Railed Top Handguard Zenimei Folding Stock Zenimei DTK-2 Flash Hider Asura Dynamics B13 Top Rail PTS US Palm Grip Prowin Hopup (not installed) 2 Turnigy 2S 1300mAh batteries