Featuring all-black, glass-filled polymer construction with hardened steel inserts, the KCI® 9mm 50-Round Drum Magazine is an affordable aftermarket pistol magazine, engineered to deliver smooth, jam-free operation with all double-stack 9mm Glock pistols (Gen 3 or later) and compatible carbines like the Kel-Tec Sub 2000 and AR-15s chambered in 9mm. KCI drum magazines deliver maximum capacity and impressive quality for the world’s most popular pistols—all at a price that’s hard to beat. Every KCI magazine comes with a lifetime warranty, ensuring you’ll receive a free replacement if there’s ever an issue with your purchase. KCI drum magazines come with a heat-treated internal chrome silicon wire spring, injection-molded polymer follower for maximum reliability and smooth feeding, and special finger taps for quick and easy reloading. Compatible with Glock 17, 19, 26, and 34 pistols.