Divisão Nove Airsoft in Brazil goes over the features of the Ares Amoeba Octarms Pro KM12 AEG and share what they think about it. The Ares Amoeba Pro (Octarms) M4 AEG 12" with EFCS Unit is a full metal airsoft gun in tan color. It has an EFCS gearbox, quick spring change, and is programmable with the Ares Amoeba Electronic Gearbox Programmer EFCS.