The Mancraft Ares Amoeba buttstock is specifically designed to fit Ares Amoeba Rifles. It is originally intended to be used with a U-shape adaptor, CO2 cartridge adaptor, and pressure regulator. Constructed from a solid block of anodized aluminum, this buttstock is known for its robustness and heavy-duty build quality. It features a sliding back that provides easy access to the cartridge adaptor. Additionally, the buttstock includes a window at the back, allowing the user to monitor the pressure within the system.