Tips from Rummbolt for you to do the fix on magazine feeding issues or just buy new ones... "There are not many issues on the airsoft field that are more annoying than your replica not feeding BBs properly. You see an opponent, have perfect line of sight, pull the trigger – and no BB comes out! Your opportunity for the perfect hit is gone...
The reason for those feeding issues very often is hiding in your gearbox setup, low quality BBs or a faulty hopup configuration.