Each GLOCK magazine is constructed from a hardened steel insert encased in high tech polymer to protect the magazine and prevent deformation, even when dropped from a great height. The high quality spring and follower ensure reliable feeding from the first to the last shot.15 - Round CapacityConstructed of Hardened Metal Encased in Durable PolymerViewing WindowsPolymer Base Plate

If you really want polymer perfection, run the PMAG 17 GL9. It holds 17 rounds of 9mm and works flawlessly in GLOCK-pattern firearms. When empty, the PMAG follower locks the slide back in the open position and the PMAG also drops free—loaded or unloaded—for fast, smooth operation when it matters most.Made in the USA.FeaturesFits a wide range of full-size, compact or sub-compact 9mm double-stack GLOCK-pattern firearmsHigh-visibility controlled-tilt follower offers easy visual ammo check and delivers smooth, dependable feeding. The follower also locks the slide back when the magazine is emptyThe rugged, durable, and lightweight polymer body and stainless-steel spring provide long-lasting, reliable operationRemovable flared floorplate with ridged edges provides a positive grip and makes cleaning and maintenance easyWindows on sides of the PMAG indicate a full load of 17 roundsPaint pen dot matrix for magazine markingPMAG drops free when loaded or unloaded for fast reloads