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Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight, Color: Black, Flat Dark Earth, Battery Type: Lithium, CR1632, Lithium Metal w/ Free S&H — 5 models

Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Black, HE509T-GR X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Flat Dark Earth, HE509T-GR X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
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Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
8 of 25 images
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
9 of 25 images
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
10 of 25 images
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
11 of 25 images
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
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Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
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Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
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Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
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Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
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Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
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Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
19 of 25 images
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
20 of 25 images
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
21 of 25 images
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
22 of 25 images
Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
23 of 25 images
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Black, HE509T-GR X2
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Black, HE509T-GR X2
Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Flat Dark Earth, HE509T-GR X2 FDE
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Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Flat Dark Earth, HE509T-GR X2 FDE

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Questions & Answers
Can I run this optic with just the 32MOA Circle reticle. And what does the X2 designation mean?

The x2 version addressed the lens distortion issues found on the prior version.

by Frank, Verified Owner, November 27, 2021
See 2 More Answers
can this mount directly to a pic rail? the only things I can find on it reference the RMR adapter and "industry standard" mount. Expert Answer

The Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight will not directly mount to a picatinny rail. There are mounts available specifically for the 509T that can be found by using the links below:
https://www.opticsplanet.com/reptilia-dot-mount-for-holosun-he509t.html
https://www.opticsplanet.com/american-defense-manufacturing-holosun-509t-qd-mount.html
https://www.opticsplanet.com/american-defense-manufacturing-holosun-509t-qd-mount-titanium-lever.html

by Ethan, Gear Expert, July 29, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Great sight - in stock - quick shipping by Sean, Verified Owner, May 22, 2026
This sight is great. I am use to the green dot. the gold is nice. having the closed emitter is comforting. not sure why, but if you look through the sight and move yoru view so the targeting circle is toward the edges of the glass, it starts to fade...
Read More...
1/1 found this helpful
Helpful Positive Review
Clear glass, bright clean reticle by Hrpman, Verified Owner, January 23, 2026
I bought this to top off a Beretta 1301 and so far I have had no issues after about 300rds, it has held zero perfectly and haven't had any flickering with recoil. The solar failsafe was also a deciding factor for me in making this purchase over an Ai...
Read More...
3/3 found this helpful
Helpful Positive Review
Improved over original by FishMD, Verified Owner, December 28, 2021
So at first I got the older version of this optic. (Non-x2). That was honestly a disappointment. Glass was pretty tinted and there was a pretty bad amount of distortion of the lense around the edges, plus a lot of glue. This version (x2) is way be...
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37/39 found this helpful
Helpful Positive Review
awesome product by Robert Ruiz, Verified Owner, June 13, 2025
Fits well on my Glock 20 GEN 5 MOS. My only issue was the smaller screws were still too big so I had to grind it down a little, so be sure to have a tool that can grind down screws because you will need it. Zeroing it in was very easy. You also may n...
Read More...
1/1 found this helpful
Helpful Positive Review
My second HS509T X2 by JT1921, Verified Owner, June 29, 2024
This is my second 509T. I have one on an offset mount on my AR for years and 1000's of rounds with no issues. So when it came time to get an optic for my Beretta 1301, I didn't think twice
7/7 found this helpful
Helpful Positive Review
Great Product (Holosun 509T) by Trevor Shaffer, Verified Owner, February 11, 2026
Purchased for my Glock 45 and it has done a great job performing at the level I initially thought it would. Highly recommend.
1/1 found this helpful
Read All 94 Reviews
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Product Info for Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight

Designed for pistol applications, the new Holosun HE509T X2 features Super LED technology with an impressive 50k hours of battery life and Solar Failsafe technology that keeps you powered in the rare event of battery failure. Shake Awake technology activates the LED during periods of motionlessness and can extend battery life to upto 100K hours in some cases. These Red Dot Sights are encased in durable Grade 5 titanium housing that withstands seawater all while keeping fatigue at bay.image

WARNING: California`s Proposition 65

Specifications for Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight:

Manufacturer: Holosun
Fabric/Material: 7075 Aluminum
Magnification: 1 x
Objective Lens Diameter: 0.66 - 0.9 in
Objective Window Size: 0.66 x 0.9 in
Illumination Type: LED
Eye Relief: Unlimited
Adjustment Type: MOA
Adjustment Click Value: 1 MOA
Optical Coating: Multi-Coated
Battery Type: Lithium, CR1632
Battery Quantity: 1
Water Resistance Level: IP67
Height: 1.35 in
Package Type: Box
Quantity: 1
Red Dot Sights-Footprint: Holosun 509T
Condition: New

Features of Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight:

  • CR1632 battery port does not require removal of optic from firearm.
  • Improved programming that enhances usability.
  • Addition of Lock Mode: Lock mode locks out the buttons until a deliberate long press unlocks them.
  • Improved glass clarity.
  • Auto mode now runs in the background and offers solar power when there is no battery or dead battery.
  • Up to a 50,000 Hour battery life.
  • Solar Failsafe.
  • Multi-Rectical System (MRS): 32 MOA Circle & 2 MOA Dot; 2 MOA Dot; 32 MOA Circle.
  • Shake Awake Technology.
  • CNC Milled 7075 Aluminum Housing.
  • Reticle Brightness: 10 Daylight & 2 Night Vision Compatible Settings.

Package Contents:

  • Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight
  • RMR-to-509T Adapter
  • T10 L Key
  • User Manual
  • CR1632 Battery
  • Lens Cloth

Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight Orderable Models

List of Orderable Models

  • Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Black, HE509T-RD X2 , MPN: HE509T-RD X2 , UPC: 810047071600 , Code: 28Y-RD-HS1011-HE509T-RD-X2
  • Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight, Gold 2 MOA Dot, 32 MOA Circle, Black, HE509T-X2-GD , MPN: HE509T-X2-GD , UPC: 810047074618 , Code: 28Y-RD-HS1011-HE509T-X2-GD
  • Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Black, HE509T-GR X2 , MPN: HE509T-GR X2 , UPC: 605930625868 , Code: 28Y-RD-HS1011-HE509T-GR-X2
  • Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Red LED, Flat Dark Earth, HE509T-RD X2 FDE , MPN: HE509T-RD X2 FDE , UPC: 810047073109 , Code: 28Y-RD-HS1011-HE509T-RD-X2-FDE
  • Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, 2x 0.66 x 0.9 in, Green LED, Flat Dark Earth, HE509T-GR X2 FDE , MPN: HE509T-GR X2 FDE , UPC: 810047073116 , Code: 28Y-RD-HS1011-HE509T-GR-X2-FDE

Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Holosun HE509T-X2-GD 1x 0.66x0.9 in Reflex Red Dot Sight, Gold 2 MOA Dot, 32 MOA Circle, Black, HE509T-X2-GD , MPN: HE509T-X2-GD-DEMO , Code: 28Y-RD-HS1011-HE509T-X2-GD-DEMO-OB-A
  • DEMO, Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight, Green LED, Flat Dark Earth, HE509T-GR X2 FDE , MPN: HE509T-GR X2 FDE-DEMO , Code: 28Y-RD-HS1011-HE509T-GR-X2-FDE-DEMO
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Last updated 2026-11-04 UTC.