ARES Complete Gear Boxes Front Wire w/ ECU for Ameoba / Ares M4 Series

ARES Complete Gear Boxes Front Wire w/ ECU for Ameoba / Ares M4 Series Electronic Firing Control System (E.F.C.S) Front Wire Complete Gear Box Set Reinforced Metal Gear Box Housing Full Steel Gear Set allow to shoot in either, Semi / Burst, Burst / Full Auto, or Semi / Semi as well. Version 2 gearbox, will fit in MOST brand M4 AEG as all gearboxes are relatively the same shape and size Ssome G&P and VFC bodies change depending on the model so there may be need for some modifications *For you to alter the fire selecting mode, you will also need to purchase the ARES Electronic Firing Control System.