Combining impact-resistant polymer construction with tough steel inserts, numbered witness holes, and steel internal springs, the Glock® 17, 19, 26, 34 Gen4/5 9mm 33-Round Factory Magazine is a genuine factory OEM magazine, engineered to deliver incredible firepower and unwavering reliability with a variety of double-stack-compatible Glock pistols. Glock 9mm magazines are duty-tested and combat-ready, making them the most trusted brand among law enforcement and military professionals across the globe. Built to the same specs as all factory Glock magazines, this 33-round mag is the ultimate addition to any 9mm duty kit and comes with a very strong spring rate from the factory to ensure reliability in the toughest of conditions. To top it off, this magazine comes equipped with steel-reinforced feed lips and a self-lubricating polymer follower for a snug, wobble-free fit and smooth and dependable feeding performance in virtually any scenario. What are you waiting for? Grab a few 33-round extended magazines for your Glock kit today!