The problem with most AEG magazines is that the internal BB channels are double stack, while the followers are typically undersized single stack followers in order to go all the way to the top of the mag. Double stack sized...

Maple Airsoft Supply’s SuperFeed series replacement high speed magazine springs are perfect match for AEG, GBB, and PTW platforms. These updated Generation 2 springs are heat treated to help retain their shape and avoid being crushed under their own weight....