First Look At Glock OEM 15 Rounders for 43x/48 - Are They Reliable EVEN with Polymer Mag Catches?

Published on May 8, 2026
Duration: 8:16

This video provides an in-depth review and reliability test of the new Glock OEM 15-round magazines for the Glock 43X and 48. The presenter, with apparent expertise in firearms, tests these magazines extensively with various ammunition types and firearm configurations, including those with aftermarket slides and barrels. The review highlights the magazines' reliability, ease of loading, and compares their physical dimensions to existing options, while also addressing potential concerns about polymer mag release wear.

Quick Summary

The new Glock OEM 15-round magazines for the 43X and 48, manufactured by Mec-Gar, have demonstrated excellent reliability in extensive testing with various ammunition and aftermarket firearm components. While they offer a significant capacity increase, they are notably longer than previous flush-fit options, fitting between Glock 19 and Glock 17 magazine lengths.

Chapters

  1. 00:01Introduction: New Glock 15-Round Mags
  2. 00:11Gen 6 Release Context
  3. 00:23Impact on 43X/48 Market
  4. 01:10Mec-Gar Manufacturing
  5. 01:34Importance of Reliable Magazines
  6. 02:07Testing Methodology and Firearms Used
  7. 02:31Testing with Aftermarket Slides/Barrels
  8. 03:26Comparison to Previous Capacity Options
  9. 03:43Comparison to Shield Arms Mags
  10. 04:15Physical Dimensions: Length Comparison
  11. 04:48Reliability Expectations
  12. 04:52Ease of Loading
  13. 05:00Long-Term Loaded Magazine Test
  14. 05:11The Only Complaint: Length
  15. 05:29Concerns: Polymer vs. Metal Mag Releases
  16. 06:07Personal Experience with Mag Release Wear
  17. 06:21Glock's Design Choices
  18. 06:43Why No Metal Mag Release from Glock?
  19. 06:56Comparison with Glock 19/17/45
  20. 07:35Glock 48 Customization Example
  21. 07:55Final Thoughts and Conclusion

Frequently Asked Questions

Are the new Glock 15-round magazines for the 43X and 48 reliable?

Yes, extensive testing indicates the new Glock OEM 15-round magazines for the 43X and 48 are highly reliable. They performed flawlessly with various ammunition types and in firearms with aftermarket slides and barrels, showing no feeding or ejection issues.

Who manufactures the new Glock 15-round magazines for the 43X and 48?

The new Glock OEM 15-round magazines for the 43X and 48 are manufactured by Mec-Gar. Mec-Gar is a well-respected company known for producing high-quality magazines for many firearm brands.

How do the new Glock 15-round magazines compare in size to previous options?

The new 15-round Glock OEM magazines are significantly longer than the flush-fit 10-round magazines for the 43X/48. They are longer than a Glock 19 magazine but shorter than a Glock 17 or 45 magazine, offering increased capacity at the expense of a longer profile.

Are there any concerns about using the new metal Glock 15-round magazines with polymer Glock mag releases?

There is a potential concern that the metal construction of the new Glock 15-round magazines could cause wear on the polymer Glock magazine release over time. While some users have not experienced issues, it's a factor to consider for long-term durability.

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