One of our favourite Spanish-language YouTube Channels, Banana Airsoft, gives a product presentation on the Ares Amoeba Octarms x M4 KM15 AEG. The Octarms Series comes in various lengths and for this review, it is the AEG with the 15-inch rail system. It has a metal receiver, a KeyMod rail system to make it lightweight and have a lower profile, it is a programmable with the Gearbox programmer box that is a standard feature in most Amoeba airsoft guns.