The latest in the Amoeba Airsoft line of Ares Airsoft, the Octarms X Amoeba M4-KM15 is available at RedWolf Airsoft... "The ARES Octarms X Amoeba M4 Assault Rifle AEG comes in a variety of lengths (this version features a 15 inch rail system) in either tan or black form and is the latest in the line of Amoeba AEGs which we all know to be more reliable than its predecessors.