Tanie Militaria gives a full review of the WE Airsoft Hi-Capa 5.1 Version R GBB Pistol that they have at their store... "The replica was made of metal and plastic . The pistol grip, magazine release and some elements of the internal mechanism are made of plastic. The remaining elements are made of metal, which gives the replica a realistic weight and durability. Metal lock and perfect fit ensure long and trouble-free operation of the gun.