Maximize your firepower potential without breaking the bank with the ProMag® 9mm 50-Round Drum Magazine for Glock® 43X / 48 pistols from GunMag Warehouse. This affordable high-capacity drum mag features a durable, steel-lined DuPont™ Zytel® polymer body for lasting performance, superior corrosion resistance, and enhanced durability. Plus, this aftermarket drum magazine features a heat-treated chrome silicon wire spring, designed to eliminate binding and deliver smooth operation with the injection-molded polymer follower for more reliable feeding performance. Still not convinced? This ultrareliable drum magazine is backed by ProMag's legendary lifetime warranty, ensuring optimal reliability and superior quality you can depend on. Made in USA.