The Magpul PMAG 21 GL9 is a 21-round GLOCK 9mm handgun magazine featuring Magpul’s proprietary all-polymer construction for flawless reliability and durability over thousands of rounds. Meeting the overall length requirements for a 140MM competition magazine, the PMAG 21 GL9 offers additional capacity without the need for expensive extensions.

High visibility controlled-tilt follower, stainless steel spring, easily removable floorplate for cleaning, paint pen dot matrix for mag marking, and ridged floorplate edges for better grip. Magazine indicator windows on both sides of the magazine body at 10, 15, and 21 rounds remaining. Drops free loaded or unloaded. All with the same boring reliability you expect from an OEM magazine.

The Magpul PMAG 21 GL9 is compatible with all full-size, compact, and sub-compact double-stack GLOCK 9mm variants with some protrusion below the grip.

Magpul was founded in 1999 with the intent of developing a simple device to aid in the manipulation of rifle magazines under stress. The company name comes from this original product, called the Magpul.
Over the last twenty-plus years, Magpul has continued to grow and develop, following the same mission and processes and focusing on innovation, simplicity, and efficiency.