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SKU#ARO-GR2 Holosun
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Holosun ARO Advanced Rifle Optic with 2MOA Reticle - Green Dot

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Price shown excludes VAT. The applicable VAT rate for your delivery country will be calculated and added at checkout.

The Holosun ARO Green Dot is a simple, modern rifle optic that gives you a clean 2 MOA aiming point with a bigger, more open sight picture. It’s built around a 22mm window, so you get enough space to track targets quickly without feeling cluttered, and the green dot is usually easier to pick up in bright daylight for a lot of shooters. It also comes with Shake Awake and long battery life, so it basically stays ready in the background until you pick it up. With a lower 1/3 co-witness mount included and a tough aluminum body, it’s a straightforward “just works” optic for AR-style rifles that doesn’t try to overcomplicate anything.

-Nathan (Technical Advisor)

images/assets/pdp-refresh/delivery-clock.svg We aim to dispatch in-stock items to our Ireland-based Logistics Warehouse for EU dispatch within 1-3 working days. images/assets/pdp-refresh/UK-retailer.svg Authorised UK Retailer
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Product Information FIND OUT MORE
DESCRIPTION

The Holosun ARO Advanced Rifle Optic takes performance and precision to the next level, building upon the proven success of the popular 403 and 503 series. Featuring an all-new 22mm housing design, the ARO is engineered to pair seamlessly with Holosun’s magnifier systems, making it ideal for shooters seeking a compact, modular setup. Its redesigned 1.63” lower 1/3 co-witness pedestal mount ensures a natural alignment with standard height AR-style sights, enhancing both speed and accuracy in target acquisition.

At the heart of the optic is a 2 MOA dot reticle, offering crisp and precise point-of-aim for both short-range engagements and longer shots when used with magnification. The ARO delivers parallax-free performance with unlimited eye relief, and its multi-coated glass ensures optimal clarity and light transmission in all lighting conditions.

Equipped with Holosun’s innovative Shake Awake™ Technology, the ARO intelligently conserves battery life by powering down the LED when no motion is detected, and instantly reactivating it the moment movement is sensed. This feature provides up to 50,000 hours of battery life from a single CR2032 battery, offering reliable performance whether on duty, at the range, or stored for home defence.

Crafted from durable aluminium with a MAO surface finish, the optic is built to withstand the elements. Its compact dimensions and light weight, just 3.38oz, make it a perfect companion for modern sporting rifles. Rated IP67 for water resistance, with operational temperatures ranging from -30°C to 60°C, and tested for 1000G vibration resistance, the ARO is ready for the most demanding conditions.

With 10 daylight and 2 night vision brightness settings, precision 0.5 MOA adjustments, and a rugged, streamlined form factor, the Holosun ARO delivers elite-level performance in a compact, reliable package.

SPECS

Optical Specs

  • Reticle: 2 MOA Dot
  • Light Wavelength: 540nm
  • Reticle Colour: Green
  • Parallax Free: Yes
  • Eye Relief: Unlimited
  • Magnification: 1x
  • Lens Coating: Multi-Coated

 

Electronic Specs

  • Power Source: Battery
  • Battery Type: CR2032
  • Battery Life: Up to 50,000 Hours
  • Brightness Settings: 10 Daylight Levels & 2 Night Vision Modes
  • Thermal Modes: Not Applicable
  • Digital Modes: Not Applicable
  • Video Recording: Not Applicable
  • Screen Refresh Rate: Not Applicable
  • Digital Screen: Not Applicable

 

Physical Specs

  • Window Size: 0.86 in
  • Dimensions: 2.48 × 1.54 × 2.63 in
  • Weight: 3.38 oz

 

Mechanical Specs

  • Housing Material: Durable Aluminium
  • Surface Finish: MAO (Micro Arc Oxidation)
  • Adjustment per Click: 0.5 MOA
  • Windage & Elevation Travel Range: ±50 MOA

 

Environmental Specs

  • Storage Temperature: -40℃ to 70℃
  • Operating Temperature: -30℃ to 60℃
  • Water Resistance: IP67 Rated (Submersible)
  • Vibration Resistance: 1000G
FEATURES
  • 2 MOA Dot Reticle: Provides a clean, precise aiming point ideal for both close-quarters and precision shooting.

  • Compact 22mm Housing Design: A newly designed housing that improves compatibility with Holosun magnifiers and enhances durability.

  • 1.63” Lower 1/3 Co-Witness Mount: Ensures proper sight alignment with standard AR-height iron sights for quicker target acquisition.

  • Shake Awake™ Technology: Automatically powers down the optic when idle and instantly reactivates with the slightest movement, maximising battery efficiency.

  • Multi-Coated Glass: Enhances image clarity, brightness, and light transmission while reducing glare and reflections.

  • Unlimited Eye Relief: Allows for flexible mounting positions without compromising a clear sight picture.

  • Parallax-Free Viewing: Ensures the reticle remains on target regardless of the shooter’s eye position behind the optic.

  • Lightweight and Durable Construction: Made from tough, high-quality aluminium with a matte anodised finish for rugged, long-lasting use.

  • Wide Brightness Range: Offers 10 daylight and 2 night vision compatible settings to suit any lighting environment.

  • IP67 Waterproof Rating: Fully sealed for protection against water and dust, allowing reliable use in wet or harsh conditions.

  • High Shock and Vibration Resistance: Built to withstand heavy recoil and rough handling, tested up to 1000G of vibration.

WHAT'S IN THE BOX
  • Holosun ARO Advanced Rifle Optic with 2MOA Reticle
  • 1x 1.63" optic mount
  • 1x 1.05" optic mount
  • 1x Multi tool
  • 1x Wrench
  • 1x Cleaning cloth
FREQUENTLY ASKED QUESTION(S)

1. What reticle does the ARO Green use?
It uses a simple 2 MOA green dot for fast and precise aiming.

2. Is it compatible with AR-15 rifles?
Yes, it’s designed for rifles and carbines with a Picatinny rail system.

3. What size is the window?
It uses a 22mm optic housing, giving a fairly wide field of view for a micro red dot style optic.

4. Does it have shake-awake?
Yes, it automatically powers down when idle and wakes instantly when movement is detected.

5. How long does the battery last?
Up to around 50,000 hours depending on brightness settings.

6. Does it support night vision use?
Yes, it includes low brightness settings suitable for night vision devices.

7. What height does it mount at?
It comes with a lower 1/3 co-witness mount (about 1.63" optic height).

8. Is it enclosed or open emitter?
It’s an open-emitter design, meaning the LED is not fully enclosed like duty-style optics.

9. Is green better than red?
Not objectively—green can be easier to see in daylight for some people, but it depends heavily on your eyes and lighting conditions. (This is preference-based rather than performance-based.)

10. What’s the main advantage of the ARO Green?
It’s a lightweight, durable rifle optic with a clear dot, wide field of view, and long battery life that keeps things simple while staying modern and reliable.

 
WARRANTY
DELIVERY & RETURNS
Shipping to Europe

Delivery costs & estimated arrival

Find your country below for the delivery charge and how long your order should take to reach you. All orders ship with FedEx. Estimates are in working days and exclude weekends and public holidays.

Country Up to 2kg 2kg – 30kg Estimated delivery
Order under €350 Order €350 & over Order under €350 Order €350 & over
Austria€11.95€26.95€26.95€26.955-7 working days
Belgium€8.95€14.95€14.95€14.954-6 working days
Bulgaria€11.95€31.95€31.95€31.957-9 working days
Croatia€11.95€31.95€31.95€31.956-8 working days
Cyprus€14.95€89.95€89.95€89.95Contact us
Czechia€10.95€21.95€21.95€21.955-7 working days
Denmark€10.95€21.95€21.95€21.954-6 working days
Estonia€11.95€31.95€31.95€31.956-8 working days
Finland€11.95€26.95€26.95€26.955-7 working days
France€10.95€21.95€21.95€21.954-6 working days
Germany€8.95€14.95€14.95€14.955-7 working days
Greece€11.95€31.95€31.95€31.958-10 working days
Hungary€11.95€31.95€31.95€31.955-7 working days
Ireland€6.95€6.95€8.95€8.952-4 working days
Italy€10.95€21.95€21.95€21.955-7 working days
Latvia€11.95€31.95€31.95€31.956-8 working days
Lithuania€11.95€31.95€31.95€31.956-8 working days
Luxembourg€11.95€31.95€31.95€31.955-7 working days
Malta€14.95€89.95€89.95€89.95Contact us
Monaco€10.95€21.95€21.95€21.954-6 working days
Poland€10.95€21.95€21.95€21.955-7 working days
Romania€11.95€31.95€31.95€31.956-8 working days
Slovakia€11.95€31.95€31.95€31.955-7 working days
Slovenia€11.95€31.95€31.95€31.956-8 working days
Spain€11.95€26.95€26.95€26.955-7 working days
Sweden€11.95€26.95€26.95€26.955-7 working days

Returns & withdrawal

Which option you use depends on why you are sending the item back.

Changed your mind?

You have 14 days from receiving your order to withdraw from your purchase. Use our Withdrawal from Contract form to tell us. It is the quickest way, and we will then email you a free returns label.

If you would rather post the item back yourself to our returns address in Ireland, you pay the postage. Full details are on our Returns page.

Withdrawal from Contract

Faulty, damaged or wrong item?

If your item arrived faulty, damaged or not what you ordered, please follow the steps on our Returns page. We cover the cost of returning these items.

Full details of all our return options are on that page.

Returns page

Delivery prices are shown in euros and confirmed at checkout.

EU PRODUCT SAFETY AND COMPLIANCE

Product safety information is available on request from our customer service team.

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