An affordable alternative to factory magazines, the ProMag® FN® 509 9mm 32-Round Magazine is a performance-enhanced aftermarket magazine, designed to deliver reliable operation and a factory-like fit at a fraction of the cost of OEM magazines. Featuring a heat-treated steel body with a durable, corrosion-resistant blued finish for lasting durability and superior corrosion resistance, while the heat-treated chrome silicon wire spring and injection-molded polymer follower deliver flawless operation for reliable feeding. To top it off, this magazine is backed by ProMag's legendary lifetime warranty for lasting service and a commitment to quality you can truly depend on. Made in USA.