If you'd rather use batteries than gas for your airsoft sidearm, then an AEP is for you. Airsoft Sports got the CYMA CM128 Hi-Capa 5.1 AEP which is made of ABS and the slide made of metal. Magazine has a capacity of 36BBs and is powered by a 7.2v 500mah battery... "A brief review of the Cyma CM128 Hi-Capa 5.1 AEP airsoft pistol. You can buy and get acquainted with more detailed technical characteristics on our website."