This is a factory Glock 19 Gen 5 15 round magazine/extended magazines. 

This Glock 19 extended magazines features its factory steel-lined polymer construction, providing unrivaled durability and reliability. Instantly recognizable with Gen 5 upgrades, it has the new orange follower and angled base pad.

Its steel-reinforced feed lips, anti-tilt follower, and steel-wire spring all come together to provide reliable feeding into your Glock 19 pistol. With numbered rear-facing witness holes, the orange follower accurately counts loaded rounds or indicates a clear chamber – super convenient! In addition, the polymer baseplate can be removed when needed, giving you access to the inner workings of the magazine for any desired cleaning or maintenance.

Load up your arsenal and pick up a few extra Glock 19 factory magazines!