Holosun 509T Pistol Red Dot Review - A Worthy Successor?

Published on January 26, 2021
Duration: 11:29

This guide details the installation and adjustment of the Holosun 509T pistol red dot sight. It covers mounting considerations for various pistol platforms like Glock MOS and IWI Masada, including the impact of adapter plates on height over bore. The guide also explains how to use the adjustment knobs, power the sight on/off, switch reticle modes, and navigate the Auto, Manual, and Lockout operating modes. Proper battery replacement and sealing are also addressed.

Quick Summary

The Holosun 509T pistol red dot sight offers enhanced durability with an enclosed emitter and titanium construction, weighing 1.75oz. It features a switchable 2 MOA dot/32 MOA circle-dot reticle with impressive battery life (up to 50,000 hours). Mounting requires specific adapter plates, and it includes Auto, Manual, and Lockout modes, plus Shake Awake functionality.

Chapters

  1. 00:00Introduction & 508T Comparison
  2. 01:06Profile and Dimensions
  3. 01:34Height and Holster Compatibility
  4. 01:54Weight and Mounting Details
  5. 02:37Mounting with IWI Masada
  6. 03:27Exterior Controls and Adjustments
  7. 03:52Battery Tray and Brightness Buttons
  8. 04:53Powering On/Off and Modes
  9. 05:37Glass Quality and Distortion
  10. 06:25Color Cast and Reticle Brightness
  11. 07:05Reticle Options and Battery Life
  12. 07:42Operating Modes
  13. 09:04Shake Awake Functionality
  14. 09:21Feature Richness and User Experience
  15. 10:10Final Verdict and Recommendations

Frequently Asked Questions

What are the key differences between the Holosun 509T and the 508T?

The Holosun 509T features an enclosed emitter for enhanced durability against elements and a titanium housing. While dimensionally similar, the 509T is slightly shorter and lighter. A key difference is the 509T's dual-pane glass, which may introduce more distortion than the 508T's single-pane glass.

How does the Holosun 509T mount on different firearms?

The 509T uses an RMR mounting pattern but requires a specific Holosun adapter plate, increasing its height over bore. For Glock MOS systems, a separate adapter plate is needed. Direct slide cuts offer the lowest height over bore.

What are the reticle options and battery life for the Holosun 509T?

The 509T offers a 2 MOA dot with a 32 MOA circle-dot reticle, switchable to a 2 MOA single dot. Battery life is rated at 12,000 hours for the circle-dot and 50,000 hours for the single dot (at setting 6).

What are the different operating modes of the Holosun 509T?

The 509T features Auto mode (automatic brightness and power adjustment), Manual mode (user-controlled brightness), and Lockout mode (locks current brightness setting to prevent accidental changes). The Shake Awake function conserves battery by turning the reticle off during inactivity.

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