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Holosun  |  SKU: HS-509T-FDE-GR

Holosun 509T X2 Green Dot FDE, MRS Reticle, Closed Emitter, Titanium, Solar Failsafe, RMR Footprint - HS-509T-FDE-GR

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$459.99

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Description

The Holosun 509T X2 Green is an enclosed emitter pistol optic made out of Grade 5 Titanium. It has a custom 509T clamping footprint, but ships with an RMR adapter plate. There are many aftermarket 509T adapter plates which can be found here.

The 509T X2 is one of the most durable enclosed emitter pistol optics on the market. It’s intended for use on compact or full size pistols. For the best reliability, we recommend mounting the 509T on a slide that has a direct RMR cut slide. If you have a pistol like a Glock MOS with the RMR adapter plate, you would need to create a “plate sandwich” to mount this optic which means stacking two plates on top of each other. In this case we would recommend eliminating one plate by purchasing something like the Glock MOS to 509T adapter plate. This will increase reliability.

The 509T X2 features the MRS Reticle (multi reticle system). This gives you a 32 MOA outer ring, and a 2 MOA center dot. The outer ring is useful for finding the dot and up close shots, and the 2 MOA dot is great for precise shooting.

In addition to it’s ultra durable Grade 5 Titanium housing, the 509T X2 has a solar failsafe, shake awake, auto and manual brightness modes, 2 nightvision modes, IP67 waterproof rating, side removable battery, and has a battery that will last between 20k-50k hours depending on reticle and brightness levels.

The MRS reticle can be toggled to use the 32 MOA circle or 2 MOA dot only by holding down the “-” button for 3 seconds.

If you are looking for a duty grade enclosed emitter pistol optic at a competitive price, then this is it.

This optic has a green reticle. Green has a few benefits:

  • Green reticles are less straining for the eye to see.
  • Green reticles can help with astigmatism. If you have astigmatism you will see a blurry dot, we have been told by a few customers that Green dots help with their astigmatism, making the dot look more crisp than the red version.
  • Green will not washout on backdrops like green grass, foliage, or green colors.
  • In theory Green dots can have a longer battery life because Green is brighter, so for example a green dot on brightness setting 6 may be the same brightness as a red dot on setting 7 - which would save battery life.

If you want to learn more check out our full article about Red vs Green Dot Pros & Cons here.

Holosun 509T X2 Reticle 

Freedom Gorilla Staff Review

The HE509T-FDE-GR is an enclosed reflex optical sight designed for pistol applications. Its features include a Titanium housing, Holosun’s Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake technology. 

Let’s start out with what an enclosed emitter optic is and how it compares the open emitter optic. Unlike the 407 or 507 k and c series, which are open reflex optics, the 509T is an enclosed optic. Enclosed optics feature an enclosed emitter that utilizes a hood-like system and an additional lens to protect the emitter and ensure nothing can come between your lens and the emitter. A drop of rain or snow or lint on the emitter can cause your reticle to spatter and starburst. With no reticle, an optic is quite useless. With an enclosed optic, this is not an issue at all. 

So when deciding if you want an open or enclosed emitter, in my opinion I’d think about how durable you want the optic to be and how much you want to spend. If you’re hard on your guns and want a bulletproof reliable red dot, it’s hard to beat these closed emitter red dots. Especially since the 509T has a titanium casing that can take a beating. 

Now let's look at some of the features of this optic. Like other Holosun pistol optics the 509T has shake-awake technology, Solar FailSafe, 50k hours of battery life, and a multi reticle system. 

As far as settings go, like other Holoson optics this also has the auto, manual, and lock mode. Auto Mode is the default setting and it operates with the solar cell and internal battery two-way power supply. Essentially based on your ambient lighting level, the sight will auto adjust the brightness of the dot and also switch between battery and solar cell power if the solar cell cannot drive the reticle alone. 

You can switch to manual mode from auto mode by holding the “+” brightness button for about 3 seconds, you’ll know it’s on manual mode when the reticle blinks once. In manual mode there are 12 reticle brightness levels. Level 1 and 2 are night vision compatible and obviously setting 12 is the brightness. You can increase or decrease the brightness by pressing the “+” or “-” brightness buttons. Personally I always leave mine on manual mode and about setting 6 with the 32MOA ring only. And one cool feature is the sight will remember the last saved brightness setting when powered on and off.

Next, let's cover the installation on a slide. It is different from the K and C series, but it is still not complicated to install. The 509T comes included with a RMR adapter plate, which is the same footprint as the 407/507C,  and Holosun also sells a MOS adapter for the 509T. To install the 509T, first you have to attach the mounting plate to the slide using the two included 6-32 T10 flat head screws and tighten the screws to 15 in/lbs. Then using the included T10 Torx tool, loosen the clamp screws and attach the 509T onto the plate so the recoil lug engages the slot on the plate. Then apply forward pressure and tighten to 20 in/lbs. 

A side note here - while looking at the 509T I was wondering if the clamp would fit onto a picatinny rail, and it does not but I did see an adapter that would work for that. 

As for its dimensions the optic is 1.6x1.6x1.13. It weighs 1.72 oz. and the window size is 0.66x0.9. So let’s compare that to the 507C, which has the same footprint. The 507C is 1.78x1.15x1.15. It weighs 1.5oz. And the window size is 0.63x0.91. Overall the dimensions are pretty similar but the 507C is slightly longer. I would have thought that the 509T would have been a bit more heavier since it is titanium instead of aluminum and has a second lens, so that’s cool to see. 

Overall the closed emitter optics from Holosun are a great choice for someone who wants absolute reliability. Let us know in chat or through text if you have any additional questions!


User Manual:

Download the 509T User Manual

Specifications

Holosun 509T X2 Green FDE Specifications

Physical Specifications

  • Enclosed Emitter: Yes
  • Footprint: 509T Footprint, Includes RMR Adapter Plate
  • Recommended Applications: Full Size & Compact Pistols
  • Housing Material: Grade 5 Titanium
  • Window Size (in): 0.66Hx0.9W
  • Deck Height: 9.86mm (without RMR plate)
  • Dimensions (in): 1.6Lx1.21Wx1.35H
  • Housing Finish: Cerakote
  • Housing Color: FDE (Flat Dark Earth)
  • Weight: 2.2oz (3.4oz with RMR plate)
  • Magnification: 1x
  • Parallax: None
  • Eye Relief: Unlimited
  • Multi Coated Lens: Yes
  • Submersion Waterproof Rating: IP67
  • Vibration: 5000G
  • Storage Temperature: -40℃~70℃
  • Working Temperature: -30℃~60℃

Included in the Box

  • Picatinny Mount Included: no
  • Adapter Plate Included: yes, RMR to 509T
  • Screws Included: 6-32x1/4
  • Cover Included: no
  • Lens Cloth: yes
  • Multi Tool: yes
  • Manual: yes
  • Warranty Card: yes

Reticle Specifications

  • Reticle Size: 32 MOA Outer Ring, 2 MOA Center Dot (MRS)
  • Reticle Color: Green
  • Adjustment Per Click: 1 MOA
  • W&E Travel Range: ±30 MOA

Electronic Specifications

  • Solar Failsafe: Yes
  • Auto Turn On: Yes
  • Auto Turn Off: Yes
  • Manual Brightness: Yes
  • Automatic Brightness: Yes
  • Brightness Settings: 10 Daylight, 2 Nightvision
  • Lockout Mode: Yes

Battery Specifications

  • Battery Type: CR1632
  • Battery Life: 20,000 Hours (Ring + Dot) 50,000 Hours (Dot Only) (Both Setting 6)
  • Removable Battery: Yes
  • Battery Location: Side of Housing

Product Specifications

  • Manufacturer: Holosun
  • Manufacturer Part Number: HE509T-GR X2 FDE
  • UPC: 810047073116
  • Country of Origin: China

Warranty

Effective January 1, 2022:

Commercial Warranty Information:

Your Holosun product is warranted to be free of defects in materials and workmanship upon registration of the product for the lifetime of the product. This warranty specifically applies to the metal structure, optical and illumination systems. The metal structure/housing and optical system (glass) of your Holosun product is warrantied for the life of the product under normal, personal use. Under the Holosun Warranty, the illumination system (LED), is warrantied for 10 years from the manufacture date under normal, personal use. In the event of a confirmed defect under this warranty, we will, at our option, repair or replace the product with a Holosun product of similar type/function, and of equal or greater value. Holosun reserves the right to make substitutions for similar product/s if the warrantied model in question is no longer in production. This Holosun Warranty does not apply to: (a) asserted defects caused by normal wear and tear of any part including knobs, finish, etc.; (b) asserted defects caused by modification including; aftermarket finishes, unauthorized service, improper maintenance, acts of Nature; and (c) asserted defects involving subjective personal likes or judgments. Also, this warranty is null and void if modification or maintenance is provided by someone other than Holosun. Holosun may restrict warranty service for our products to the country from which Holosun or its authorized dealers originally sold the Holosun product. For warranty claims outside the United States, the costs of shipping or transporting the product (including to and from Holosun or our dealer), any insurance or any fees, duties and taxes are the sole responsibility of the purchaser and will not be covered by this warranty.

For customers inside of the United States seeking warranty service, please email info@holosun.com

Fitting Guide

Holosun 509T Fitment Information

Below is information on mounting the Holosun 509T Reflex Sight on different pistols. Some pistols require adapter plates to make it fit. The table below is for Optics Ready pistols only. If you do not have an optics ready pistol and still want to mount a 509T to your platform, you can get a dovetail mount which replaces your rear dovetail sights. Find all our dovetail mounts here.

*Note: Clicking on the pistol name below will take your to our fitment guide which explains more about each platform.

Anderson Manufacturing

Arsenal Democracy

Bul Armory

CZ

FN

Heckler & Koch

    Palmetto State Armory

    Shadow Systems

    Smith & Wesson

    Staccato 2011

    Taurus

    Wilson Combat

    Arex

    Beretta

      FMK

      Glock

      IWI

      Nighthawk Custom

        Sig Sauer

        Springfield Armory

        Stoeger

        • Stoeger STR9 (will fit using Stoeger RMR plate + included 509T RMR adapter plate)

        Walther

        Don't see your model listed? Check out our Fitment Guides Here.

        Key Features
        • 509T Footprint with RMR Adapter Plate: Confirm Pistol Fitment Here
        • Enclosed Emitter
        • Grade 5 Titanium Housing
        • MRS Reticle: 32 MOA Outer Ring, 2 MOA Center Dot
        • Solar Failsafe
        • Up to 20K Hrs Battery Life (MRS Reticle), 50KHrs (2 MOA Dot Only) (Setting 6)
        • Manual & Auto Brightness Modes
        • 12 Brightness Setting: 10 DL & 2 NV Compatible
        • Convenient Tray Battery Compartment
        • Parallax-free & Unlimited Eye Relief
        • Designed for Full Size & Compact Pistols
        • IP67 Waterproof
        • Shake Awake
        • Multilayer Reflective Glass

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        Customer Reviews

        Based on 5 reviews
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        N
        Nathan Hansen

        Holosun 509T Green Dot FDE, Closed Emitter, Titanium, Solar Failsafe, RMR Footprint - HS-509T-FDE-GR

        C
        Corey

        Great customer service! Called multiple times before ordering to make sure I had the correct plate and optic that I wanted.

        P
        Phil Botting
        Service

        Great service from staff.

        J
        Jay Bruhn
        The Green Dot Is Great — but Be Aware of “Foundational” Challenge

        In the end the Holosun 509T is a remarkable sight and I am blessed to have support for my progressive lense supported eyesight.
        However, I had to buy an additional adapter to fit the green dot onto the factory cuts of my FN 509 slide causing an unexpected additional $80.00. Budget carefully!
        Freedom Gorilla’s tech support was top notch and they are a pleasure to work with. I will gladly recommend them to my friends.

        T
        Tommy Harrison
        Best Green Dot

        It's easy to use and well built.

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