G&G CM18 MOD 1 Black & Tan (MK18) body is made from G&Gs tough polymer like that of the CM16s. barrel & Rail system are metal and includes a set of metal flip-up sights, Magazine & Rail covers The adjustable stock can fit 9.6 NiMh battery or 7.4 lipo. Battery & Charger not Included. 9.6v crane stock battery & Smart charger recommended