Mec-Gar MGSW5917N is a detachable 17-round magazine for 9mm Luger, compatible with S&W 5900 Series, 910, 915, and 659 models. This magazine features a high-impact polymer follower and a heat-treated carbon steel tube, ensuring durability and reliability.Key FeaturesCapacity: Holds 17 rounds of 9mm Luger ammunition.Material: Constructed with a heat-treated carbon steel tube and a high-impact polymer floor plate.Compatibility: Fits S&W 5900 Series, 910, 915, and 659 models.