This magazine is a factory original from Sig Sauer for the P320 9mm pistols. 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 extra magazines save loading time at the range and also serve as a backup for those days when someone goes full potato. Never go full potato.
Specifications: Caliber: 9mm, Capacity: 21 Rounds, Body Material: Steel, Floorplate: Polymer.
This is for one OEM SIG SAUER 21 round magazine.