The ProMag Ruger MAX-9 10-Round Magazine from GunMag Warehouse is an aftermarket magazine built for a solid fit and reliable function with your MAX-9 pistol. Heat-treated steel construction combines with a corrosion-resistant black oxide finish to create an extremely durable and reliable magazine that can take on any range day or consistent concealed-carry. Plus, the heat-treated stainless steel spring and injection-molded polymer follower join forces to ensure smooth, consistent feeding shot after shot. If that's not enough, this magazine is backed by ProMag's lifetime warranty.