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Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight, Color: Flat Dark Earth, Black, Battery Type: Lithium, CR1632 w/ Free S&H — 3 models

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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 red dot by steve, Verified Owner, March 8, 2025
I’ve not got 3 of these and they all work great. One on a shotgun, one on a pistol and one as a backup sight on a rifle. I’ve not had an issue with any of them.
1/1 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...
Read More...
31/33 found this helpful
Helpful Positive Review Holosun 509T X2 Green by Scolar, July 14, 2022
I bought this for a Sig P320 Xfull, but only have about 100 rounds on. Sighting it is very easy, accuracy is repeatable and target acquisition is fast even in daylight. I'd recommend this for any of your weapon systems.
6/6 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
2/2 found this helpful
Helpful Positive Review Astigmatism by Tom N, Verified Owner, May 1, 2025
I have been using red dots for the past several years. I do not wear corrective glasses.Because of a slight Astigmatism the red dot looks more like a comma than an actual red dot. After a lot of research it seemed apparent to me to go with the green ...
Read More...
2/2 found this helpful
Helpful Positive Review holosun 509t green by Wyatt Aubert, Verified Owner, May 6, 2025
I absolutely love this optic, works amazing on my Stealth Arms Platypus. Has a big window and a clear dot
1/1 found this helpful
Read All 75 Reviews

Best Rated Product

Our customers have spoken – this is one of the best rated products in the Red Dot Sights & Accessories category! See more best rated Red Dot Sights & Accessories products
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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
Finish: CNC Machined
Fabric/Material: 7075 Aluminum
Magnification: 1 x
Objective Lens Diameter: 0.66 - 0.9 in
Reticle: 32 MOA Circle, 2 MOA Dot & 32 MOA Circle, 2 MOA Dot
Illumination Type: LED
Brightness Settings: 10
Eye Relief: Unlimited
Adjustment Type: MOA
Adjustment Click Value: 1 MOA
Parallax: Parallax Free
Optical Coating: Multi-Coated
Battery Type: Lithium, CR1632
Battery Quantity: 1
Operating Temperature: -30 - 60 Celsius
Water Resistance Level: IP67
Length: 1.61 in
Width: 1.21 in
Height: 1.35 in
Weight: 1.72 oz
Condition: New
Package Type: Box
Quantity: 1
Red Dot Sights-Footprint: Holosun 509T
W/E Travel at 100 Yds: 30 MOA

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
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Image of Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight 3 models Holosun HE509T 2x 0.66 x 0.9 in Reflex Red Dot Sight

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, 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, Red LED, Black, HE509T-RD X2 , MPN: HE509T-RD X2 , UPC: 810047071600 , Code: 28Y-RD-HS1011-HE509T-RD-X2
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 2x 0.66 x 0.9 in Reflex Red Dot Sight Unavailable & Discontinued Models

List of Unorderable Models

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
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 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, 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 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, 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, Green LED, Black, 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
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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, 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
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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
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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, 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, 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

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For more information go to www.p65warnings.ca.gov

Notification

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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