If you are looking for a magazine for your Smith & Wesson 5900 Series, 915, 910, or 659 pistol, choose the most trusted magazine manufacturer in the industry. All Mec-Gar magazines are made in Italy with the most sophisticated technologies and the best materials. Since 1965, Mec-Gar has been a world leader in the production of magazines for the largest firearm manufacturers and militaries.Features :Finish: BluedCaliber: 9mmCapacity: 17 roundsFollower: High-impact polymerTube: Heat-treated carbon steelSpring: High tensile music wireFloorplate: High-impact polymer that sits flush with the pistol