Sentinel Gears 3500 Round Electric Auto Winding High Capacity Drum Magazine for AK-47 Series Airsoft AEG Guns
Selector switch for all the following settings:
OFF: Turns the drum mag off completely.
SOUND: Sound control auto winding mechanism works off the sound of your AEG.
AUTO: Non-stop continual winding.
Top sliding door for loading BB's.
Polymer and metal construction.
Includes: Rechargeable battery, USB connector, and triple A battery adapter.