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The Beretta PX4 Storm has long stood among the most reliable and well-engineered defensive pistols on the market, and keeping it fed with the right magazine is just as important as the firearm itself. At The Mag Shack, we’ve assembled a comprehensive collection of Beretta PX4 Storm magazines built to match the quality and dependability that PX4 owners expect, from factory-original Beretta mags to trusted aftermarket options from Mec-Gar.
Our selection spans full-size and compact frames, covers both 9mm and .40 S&W calibers, and runs the gamut from compliant 10-round configurations all the way up to 21-round extended options.
Whether you’re running the full-size frame on your nightstand or carrying the compact version every day, our inventory covers you across multiple calibers and capacities. Every PX4 magazine from our collection is sourced from manufacturers we trust.
One of the strengths of the PX4 Storm platform is its capacity flexibility. Our PX4 Storm magazines span the full range:
If you’re building a defensive setup and want maximum capacity, the Beretta PX4 Storm 9mm magazine in a 20-round configuration is a popular choice for home-protection roles.
The versatility of this platform is real, and having the right PX4 magazines in rotation means you’re ready for every role the PX4 Storm was built to fill.
Choosing between a factory Beretta magazine and an aftermarket option comes down to your priorities. Here’s how they compare:
OEM Beretta magazines are manufactured to the exact tolerances of your pistol. They feed reliably across every ammunition type, seat positively, and drop free cleanly. For a carry gun or any firearm you’re trusting for self-defense, these are the gold standard. The Beretta PX4 magazine lineup from the factory is what we’d recommend as your primary carry and home-defense mags.
Mec-Gar aftermarket magazines represent the best of what the aftermarket has to offer. Mec-Gar actually manufactures OEM magazines for several major firearms brands, and their PX4 Storm magazine offerings, including the 21-round extended magazine, deliver exceptional quality at a slightly lower price point. They’re a smart choice for range use or when you’re building a deeper inventory.
If you’re running a .45 ACP variant, be sure to confirm frame compatibility, as the PX4 Storm .45 uses a distinct magazine footprint from the 9mm and .40 S&W models. Our team is here to help confirm fitment before you order.
The Beretta PX4 Storm uses specific magazines depending on its frame size.
Full-Size PX4 Storm:
Compact PX4 Storm:
You can utilize the standard 17-round magazines in either model, but the 15-round magazine that comes with the compact model is not compatible with the full-sized PX4 Storm.
While the Beretta PX4 Storm can fill many roles, it’s often utilized for personal defense in the forms of concealed carry and home protection.
It depends on the frame size and caliber. The full-size PX4 Storm in 9mm uses a 17-round magazine, while the .40 S&W version uses a 14-round standard mag. The compact models use 15-round (9mm) and 12-round (.40 S&W) magazines as their baseline capacity.
The PX4 Storm uses a proprietary magazine design that is specific to the platform. These magazines are not cross-compatible with other Beretta pistol lines, such as the 92 or APX series. Always verify fitment by model, not just brand.
Our current selection covers 9mm and .40 S&W across multiple capacities. The PX4 Storm .45 ACP variant uses a separate, model-specific magazine. We carry a full range of the Beretta PX4 Storm 9mm magazine options and .40 S&W variants. If you’re unsure which you need, reach out to our magazine specialists.
Yes. We stock the Beretta factory 20-round extended magazine and the Mec-Gar 21-round extended option, both in 9mm. These are popular for training, range use, and home-defense configurations where maximum round count is a priority.
To field-strip a PX4 Storm magazine, depress the baseplate retaining tab and slide the baseplate off the bottom of the magazine body. Remove the spring and follower, then wipe down all components and the interior of the mag body. Reassemble in reverse order. Regular cleaning, especially after range sessions, keeps the feeding smooth and extends the life of your mags considerably.
