Shield Arms S15 Gen3 Magazine for Glock 43X / 48 - 15 Rounds - Black Nitrocarb

Manufactured by Shield Arms
Manufactured by Shield Arms
9 Reviews

In Stock

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Magazines considered High Capacity are controlled by the ATF and/or local jurisdictions are not available for purchase/shipment in all areas.



Introducing the Shield Arms S15 Gen3 Magazine, a revolutionary product that is set to redefine your Glock 43X/48 experience. With its patent-pending design, the flush-fitting magazine gives you the ability to carry 15 rounds instead of the standard 10 rounds, boosting your firepower by 50%.


  • Gen3 Features a new Nitrocarb finish
  • 15 Round capacity in a flush fit mag body
  • Fits GLOCK 43x/48

The primary goal was to maintain the same Glock reliability and ensure that the magazine would fit seamlessly within the Glock's frame. The new patent-pending magazine geometry allows the rounds to stagger and fit more rounds in the same overall footprint. This, together with the US-based manufacturing and new steel with black nitrocarburized QPQ finish, ensures that you get a corrosion-resistant magazine that is tough, durable and built to last.

The Shield Arms S15 Gen3 Magazine is easy to remove, impact-resistant, and comes with a high lubricity finish. Proudly made in the USA and with a patent-pending design, this magazine is a game-changer for the Glock 43X/48 series. Remember to use the Shield Arms standard steel magazine catch to avoid any reliability issues. Order yours today, and discover how our S15 Gen3 Magazine will change the way you carry!

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BrandShield Arms
PlatformGlock Magazines
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

9 reviews

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High cap junior sticks

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They work well but I only carry 14 in them until the spring pressure backs off. 15 sometimes won’t load the top round. Best I can tell it’s to much spring pressure than the slide can push. Had zero issues with 14 loaded. This is common with all 3 generations when new. I still will buy more because one round is not a deal breaker!

Capacity of a bigger handgun


I carry 14 in mag and 1 chambered (that 15th round is tight). Amazing solution to thick walled G mags to get great capacity for EDC use.

I’ve never used the Glock mags in my G43x’s


I bought Gen 1 mags before I bought my first 43x. It took months to get them and when I got them I went and bought a G43x with the Trijicon day/night sights. I left the 10 round Glock mags in the box and stashed it with all my other boxes from gun purchases. That combo worked so well I bought a G43x MOS and have only used Shield arms mags with it as well. I acquired a bunch of Gen2 and Gen 3 mags now and have had no issues at all. I’d be skeptical about these mags now considering there are people claiming they have problems with them but I got on this band wagon before there were reviews and have had none. I like these mags and have so many I just added an Alpha Foxtrot S15 double stack 1911 to my collection that also uses these mags and it’s been great too. At $30 each this is a steal. If you buy them, please leave a review as I’d like to know how others feel about them.

Shield magazines for G43x

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Purchased the Shield 15 round magazines for my 43x and still trying to figure out how they got 5 more rounds in the same space as the 10 rounds magazine. Feeds and ejects as well or better than the Glock mags. Great product.

Great product

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Work’s as it should,reliable

S15 Mag

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Magazine works flawlessly, would suggest purchasing the kit. And Five Stars to Primary Arms !!!! Always a great experience from website ordering to delivery. Thank You !!

Great Product

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Great product, adds 50% capacity to magazine. Visual count on side of magazine helpful.
** These only worked for me when using Shield Arms Steel Mag Catch ** but that was easy to install.


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Mag was great. Functions with all ammo types, fmj, flat tip, and multiple jhp from 115 to 147 gr. Locked back on empty. Only drawback is need metal mag release. I put a Glockstore extended in works great.

Great product

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Extends your ammo capacity by 50%. No issues with misfeeds or other malfunctions.I don’t know why I waited so long to buy mine.