Holosun 509T (HE509T-RD X2) | Unboxing & Overview

Published on March 18, 2026
Duration: 5:58

This video provides an expert-level unboxing and overview of the Holosun HE509T-RD X2 (509T) red dot sight. Brian from 1st Shot Tactical details the optic's features, including its fully enclosed titanium body, Multi-Reticle System (MRS), Shake Awake technology, solar failsafe, and IP67 waterproof rating. The guide covers the mounting process using the RMR-compatible adapter and demonstrates various operational modes and reticle adjustments, highlighting its suitability for pistols and as an offset optic on rifles.

Quick Summary

The Holosun HE509T-RD X2 (509T) is a robust red dot sight featuring a fully enclosed titanium body, Multi-Reticle System (MRS), Shake Awake technology, and Solar Failsafe. It offers 8 daylight and 4 night vision settings, is IP67 waterproof, and mounts via an RMR-compatible adapter, making it versatile for pistols and rifles.

Chapters

  1. 00:00Introduction & Product Reveal
  2. 00:17Unboxing Contents
  3. 00:57Features - Enclosed & Brightness Modes
  4. 01:29Features - Multi-Reticle Options
  5. 01:42Features - Shake Awake & Durability
  6. 02:13Features - Waterproof & Glass Size
  7. 02:24Mounting Process
  8. 03:31Reticle Brightness & Adjustment
  9. 04:48Brightness Mode Adjustment
  10. 05:35Conclusion & Recommendations

Frequently Asked Questions

What are the key features of the Holosun 509T (HE509T-RD X2)?

The Holosun 509T features a fully enclosed titanium body, a Multi-Reticle System (MRS) with multiple reticle options, Shake Awake technology, Solar Failsafe, 8 daytime and 4 night vision compatible brightness settings, and an IP67 waterproof rating.

How do you change the reticle on the Holosun 509T?

To cycle through the different reticle options on the Holosun 509T (2 MOA dot, 32 MOA circle, or both), press and hold the minus button. Release the button when the desired reticle is displayed.

What is the Holosun 509T's mounting compatibility?

The Holosun 509T comes with a plate adapter that is compatible with RMR footprints. This allows it to be mounted on many pistol slides designed for RMR sights or used as an offset red dot on rifles.

Does the Holosun 509T have automatic brightness adjustment?

Yes, the Holosun 509T features an auto brightness mode that utilizes a solar panel to adjust reticle intensity based on ambient light conditions. It also has manual and lockout modes.

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