For those with itchy trigger fingers and can't have enough of BBs, Airsoft Atlanta have these S-Mags and Drum Magazines from Ares Airsoft and you can choose the S-Mags for M16 and G36 AEGs and the Drum Magazines for AK and PPsH AEGs. With the exception of the PPsH drum magazine which is 2,000 rounds, the rest have a 2,500 round capacity. All of these have the auto-wind feature.