Shield Arms S15 Glock 43x / 48 Mag


The S15 magazine is a flush-fitting 15 round magazine for the Glock® 43X and Glock® 48 – same standard size but holds and extra 5 rounds.

1 in stock

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The S15 magazine is a patent-pending, flush-fitting 15 round magazine for the Glock® 43X and Glock® 48. The S15 is a steel magazine, and is the same length as the OEM Glock® 10 round magazine, but holds an additional 5 rounds.

Increased Capacity, Same Reliability

Glock® pistols and magazines are known for reliability – the S15 maintains that same Glock® reliability, while giving you a 50% increase in magazine capacity in the same overall footprint.

Shield Arms accomplished this increased capacity with their patent-pending magazine geometry, allowing the rounds to stagger, thereby fitting more in the same amount of space.

Proudly made in the USA by Check-Mate.

Gen 2 Improvements

What changed with the Gen 2 magazine? Shield Arms made the following improvements:

  • Ambidextrous – mag catch cutout on both the left and right side
  • Smaller mag catch cutout windows
  • Improved magazine tube geometry
  • Improved baseplate geometry

Mag Catch Recommendation

Shield Arms recommends swapping out your plastic OEM mag catch with their steel mag catch. If you don’t swap your mag catch you may have reliability issuesIf you use another manufacturer’s mag catch you may have reliability issues.


  • 15 round capacity
  • Same length as an OEM Glock 43X/48 magazine
  • Easy to remove, impact resistant base pad
  • High lubricity finish, Black Oxide coating
  • Made in the USA
  • Patent-pending

Finish Options

S15 magazines currently come standard with a Black Oxide coating. Black Oxide offers only minimal corrosion resistance, so Shield Arms recommends that you wipe down the exterior of the magazine with your favorite gun lubricant to prevent corrosion.

Electroless Nickel

Electroless nickel coatings are extremely uniform, corrosion and erosion resistant, and provide excellent lubricity. If you are in a humid or salt water environment, or if you sweat a lot, we recommend Electroless Nickel or Black Electroless Nickel finish.


Like all Shield Arms products, their S15 magazine comes with their 100% lifetime warranty against manufacturing defects. Additionally, they also offer a Spring for Life Guarantee – wear out your spring, get a new one for free, for life.

Additional information

Weight 1 lbs
Gun Type


Magazine Capacity

Shield Arms S15 Glock 43x / 48 Mag

Shield Arms S15 Glock 43x / 48 Mag


1 in stock

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