Double down on firepower with the ProMag® P228 9mm 13-Round Blue Steel Magazine. Built from heat-treated steel this magazine features a corrosion-resistant black oxide finish this magazine offers unparalleled strength and durability for reliable field performance. Plus, the impact-resistant polymer baseplate adds another layer of protection and shock resistance. The heat-treated chrome silicone wire and injection-molded polymer follower ensure reliable feeding and proper cartridge alignment in high-stress target and defensive situations. The Sig Sauer P228 features a carbon steel slide and builds on the heritage of the world's premiere combat pistols—chosen and trusted by military, law enforcement, and special forces from all over the world for their accuracy and reliability. All ProMag magazines come with a lifetime warranty, ensuring you'll receive a brand-new magazine if you ever have an issue with your purchase. Grab a few spare magazines for your Sig P228 pistol today! Made in USA.