This B&T magazine APC10, SPC10 30 round polymer in the color black is a factory original from B&T. 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 for those days when you simply cannot remember where you put your primary magazine. Features30 round 10mm Auto magazineIncludes factory magazine and extensionFits any G pattern mag 10mm firearm