This genuine Glock .40 S&W 13-round magazine is designed for flawless performance and rugged durability. Made with a high-strength polymer body reinforced with a steel insert, it resists impact, deformation, and corrosion under tough conditions. The magazine features a smooth-feeding follower, durable internal spring, and factory-cut witness holes for quick round checks. Compatible with Glock .40 caliber models such as the G22 and G23 (extended capacity for G23), it’s ideal for duty use, home defense, or range sessions. Count on Glock factory mags for reliability when it matters most.