This Might Be the Most Underrated 9mm!

Published on March 12, 2026
Duration: 14:20

This review of the Derya DY9 Island 9mm pistol by A REGULAR GUN GUY provides an in-depth look at its features, performance, and value. The presenter, RGG, utilizes a structured 10-category rating system after extensive live-fire testing with various ammunition types. The review highlights the pistol's reliability, unique island barrel, and Glock magazine compatibility, offering a comprehensive assessment for potential buyers.

Quick Summary

The Derya DY9 Island 9mm pistol earned an 'above average firearm' rating with a score of 84.5/100, highlighted by a perfect 10/10 reliability score across various ammunition types and Glock OEM magazines. Key features include a factory RMR cut, a unique ported island barrel, and good trigger performance, making it a versatile option for defense and range use.

Chapters

  1. 00:00Video Intro and Shooting
  2. 00:26Channel Introduction and Derya Background
  3. 01:10Introducing Derya DY9 Island
  4. 01:45Features and Glock Compatibility
  5. 02:27Island Barrel Explained
  6. 03:12Reviewer's Testing Approach
  7. 04:00Range Setup and First Shots
  8. 05:05Ammo Testing and Initial Impressions
  9. 05:47Guests and Target Check
  10. 06:44Guest Shooter Feedback
  11. 07:49Jacksonville, Florida Connection
  12. 08:09Glock Magazine Compatibility
  13. 08:26Trigger Assessment
  14. 09:04Practical Rating System
  15. 09:59Packaging Score (9.5)
  16. 10:16Build Quality Score (8.5)
  17. 10:48Features Score (9)
  18. 11:17Trigger Score (7.5)
  19. 11:19Performance Score (8.5)
  20. 11:39Availability Score (7)
  21. 12:09Usage Score (9)
  22. 12:31Aftermarket Support Score (8)
  23. 12:45Reliability Score (10)
  24. 13:17Value Score (7.5)
  25. 13:42Overall Score and Conclusion

Frequently Asked Questions

What is the Derya DY9 Island's overall score and category?

The Derya DY9 Island received an overall score of 84.5 out of 100, classifying it as an 'above average firearm' according to the reviewer's practical rating system. This score reflects its strong performance in reliability, features, and usage.

How reliable is the Derya DY9 Island pistol?

The Derya DY9 Island achieved a perfect 10/10 reliability score in testing. It reportedly ran flawlessly with a wide array of ammunition types, including 115gr, 124gr hollow points, 158gr, FMJ, and steel case, using OEM Glock magazines without any malfunctions.

What are the key features of the Derya DY9 Island?

Key features of the Derya DY9 Island include a factory RMR cut slide, a unique ported 'island barrel', a Picatinny rail for accessories, effective grip texture, and compatibility with Glock OEM magazines. It also comes with a soft bag and three magazines.

What is the price and value proposition of the Derya DY9 Island?

The Derya DY9 Island is priced at approximately $600. While the reviewer felt $500 would be a fairer price, he acknowledged that features like the island barrel, RMR cut, and included accessories add significant value, contributing to its 7.5/10 value score.

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