How To Install Holosun 509T X2 R Dot On Your Glock 17/Pistol #optic #tactical #2ndamendment #9mmgun

Published on September 19, 2025
Duration: 0:37

This guide details the step-by-step process for installing a Holosun HE509T X2 red dot sight onto a Glock pistol, specifically mentioning Glock 17 and Glock 19 Gen 5 models. It emphasizes the use of thread locker and specific torque values for both the adapter plate (15 inch-pounds) and the optic clamp screw (20 inch-pounds) to ensure a secure and reliable mounting. The instructions cover proper seating of the optic and mention the compatibility with accessories like the Streamlight TLR-7A.

Quick Summary

To install a Holosun HE509T X2 on a Glock, first mount the adapter plate using screws torqued to 15 inch-pounds. Then, place the optic on the plate, ensuring it's seated properly, and tighten the optic clamp screw to 20 inch-pounds. Always use thread locker on all mounting screws for durability.

Chapters

  1. 00:00Introduction: Holosun 509T X2 Installation
  2. 00:04Mounting Adapter Plate to Slide
  3. 00:13Mounting Optic to Adapter Plate
  4. 00:23Tightening Optic Clamp
  5. 00:27Installed Optic Overview
  6. 00:32Call to Action

Frequently Asked Questions

What are the torque specifications for installing a Holosun HE509T X2 on a Glock?

When installing the Holosun HE509T X2 on a Glock, the adapter plate screws should be torqued to 15 inch-pounds. The optic clamping screw then needs to be tightened to 20 inch-pounds for a secure fit.

What tools are essential for mounting a Holosun HE509T X2 optic?

Essential tools for mounting a Holosun HE509T X2 optic include a torque wrench to ensure precise tightening of screws, and thread locker to prevent them from loosening under recoil.

How do you properly seat the Holosun HE509T X2 optic on the adapter plate?

To properly seat the Holosun HE509T X2, after placing it on the adapter plate, push the optic down, forward, and towards the clamping mechanism (to the left) before tightening the clamp screw.

Is thread locker necessary when installing a Holosun HE509T X2?

Yes, thread locker is highly recommended for both the adapter plate screws and the optic clamping screw when installing a Holosun HE509T X2. This helps maintain zero and prevents components from loosening due to firearm recoil.

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