For those who don't like the low capacity standard AEG Magazine 

This Hi-Cap Magazine is a direct replacement of the Standard one

800 Rounds of loading capacity are enough for most competition & skirmish airsoft game

Suitable for AK series Airsoft Electric Gun AEG Rifle Magazine (C.15)

Large thumb dial on bottom of magazine allow you to wind up the compression spring

Suitable for 6mm Plastic Bullet only