Lay down infinite firepower from your M4 AEG with the new 1,200rd Auto Winding Drum Magazine from Sentinel Gears. This innovative magazine option is powered by an included rechargeable battery, so you do not have to waste precious time winding a wheel when reloading. An additional adapter is also included with this magazine to give users the option of using 4 AA batteries to use the auto winding function. Simply press the button at the front of the magazine and the motor inside will start to automatically reload. Although this magazine holds 1,200 rounds, the full polymer construction ensures this drum magazine remains lightweight and extremely durable against the elements. The universal design of this magazine allows it to be used with most M4 & M16 style AEG airsoft rifles. Keep the rounds flowing all day and pick yourself up this 1,200 round Auto Winding Drum Magazine from Sentinel Gears today.