Glock Magazine Extension Compatibility by Model

Finding the right magazine extension for a Glock can be confusing.  (Mostly because the Glock model naming scheme makes no sense). Compatibility depends on the pistol model, magazine body, caliber, generation, magwell, and extension design. This guide organizes Glock magazine extension and base pad compatibility by pistol model so you can identify which options may work with your setup. For detailed capacity, dimensions, materials, lock-back functionality, and competition fitment, follow the links to our tested Magazine Extension & Base Pad Database entries.

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Many magazine extensions are offered for both 9mm and .40 S&W Glock magazines of the same frame size. For example, many extensions designed for Glock 17 magazines are also compatible with Glock 22 magazines. Always verify the manufacturer's listed caliber, magazine and model compatibility for the specific extension.

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Always make sure to double check your purchases to ensure proper fitment, and we highly recommend any and all accessories be installed by a qualified gunsmith.