Airsoft Station does an overview of thje CYMA CM123 AEP, or the CYMA1911 AEP that they have in stock... "Another viewer tequested video, this one is featuring the CYMA CM123. This electric pistol is modeled after the 1911 ACP .45. Since it's electric it uses a battery which is housed inside the slide. It can fire in full auto and semi auto modes."