The Tokyo Marui AA-12 / SGR-12 3000rd Drum Magazine serves as an essential spare for the Tokyo Marui Airsoft AA-12 Auto and SGR-12 models. This drum magazine boasts a substantial capacity of 3000 rounds, allowing for extended play without frequent reloads. The magazine operates using electric power, eliminating the need for manual winding. It requires four AAA batteries to function, which are not included with the product.