Constructed in the USA using the finest equipment and tooling, the bodies are built of heat-treated carbon steel (FNH models constructed of rugged military spec polymer). State-of-the-art polymer followers ensure dependable feeding. Chrome silicon magazine springs deliver years of reliable service. Each magazine is backed by a lifetime warranty, so you can count on them to perform in your rifle or pistol. Discover why ProMag magazines are the choice of U.S. military and NATO units around the world. Per pair. Made in USA. Warranty Policy: All ProMag Industries magazines are 100% warranted against manufacturers defects. Unauthorized modifications or deliberate abuse will void warranty. Defective magazines will be repaired or replaced at the sole discretion of ProMag Industries. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Handgun Magazines & Speed Loaders.