FN Five-seveN 20 Round Magazine
Manufacturer: FN America
This is a factory original from FN. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts which guarantees excellent fit and reliable operation.
Keeping a few extra factory magazines around is never a bad idea. Extra magazines save loading time at the range and also serve as a backup to your primary magazine when seconds count and reloading is not an option.