Holosun ARO Advanced Rifle Optic with Multi Reticle System (MRS) - Green Dot
The Holosun ARO Green MRS is a modern rifle optic that gives you a bit more flexibility than a basic red dot without getting complicated. It runs a 2 MOA green dot with Holosun’s Multi-Reticle System, so you can switch between a clean dot, a 65 MOA circle, or both together depending on how fast or precise you want to be. The bigger 22mm window gives you a nice open sight picture, and the Solar Failsafe plus Shake Awake tech means it stays powered and ready with minimal input from you. It also comes on a lower 1/3 co-witness mount, so it’s already set up for modern AR-style rifles right out of the box. It’s basically a rugged, adaptable optic that balances speed, clarity, and simplicity in one package.
-Nathan (Technical Advisor)
The Holosun ARO Advanced Rifle Optic with Multi Reticle System (MRS) represents the next generation in precision shooting technology. Building on the legacy of the popular 20mm 403 and 503 series, the ARO introduces a redesigned 22mm housing that integrates seamlessly with Holosun’s magnifier range and features an all-new 1.63" lower 1/3 co-witness pedestal mount, delivering superior alignment and target acquisition.
At the heart of the ARO lies Holosun’s Multi-Reticle System (MRS), allowing users to effortlessly toggle between a 2 MOA dot, a 65 MOA circle, or a combination of both. This flexibility ensures fast target engagement at close quarters, while also providing a clean, precise aiming point for longer-range shots. Whether you're on the range or in the field, the MRS adapts to your needs for ultimate versatility.
The optic is equipped with Shake Awakeâ„¢ Technology, a motion-sensitive feature that conserves battery life by deactivating the LED when idle and reactivating it instantly upon movement. This ensures your optic is always ready when you are, with user-configurable sleep timers ranging from 10 minutes to 12 hours. Paired with a CR2032 battery, the ARO offers an astonishing battery life of up to 50,000 hours, delivering unmatched reliability.
Holosun’s Super LED technology supports 10 daylight and 2 night vision brightness settings, providing crystal-clear visuals in any lighting condition. The lens is treated with multi-layer reflective coatings to enhance clarity and reduce glare, all housed in a durable aluminium body finished in MAO for maximum resilience. The optic is also parallax-free, offers unlimited eye relief, and is IP67-rated waterproof, making it a dependable companion in the harshest environments.
Compact yet rugged, the ARO weighs just 3.38oz and measures 2.48 x 1.54 x 2.63 inches, with ±50 MOA windage and elevation adjustment range and 0.5 MOA per click precision. Built to withstand temperatures from -30°C to 60°C in use and storage from -40°C to 70°C, it’s also shockproof to 1000G, ready for whatever comes its way.
Optical Specs
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Reticle: 2 MOA Dot & 65 MOA Circle
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Light Wavelength: 540nm
- Reticle Colour: Green
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Parallax Free: Yes
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Unlimited Eye Relief: Yes
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Magnification: 1x
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Multi-Coatings: Yes
Electronic Specs
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Power Source: Battery
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Battery Type: CR2032
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Battery Life: 50,000 Hours
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Brightness Settings: 10 Daylight & 2 Night Vision Compatible
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Thermal Modes: N/A
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Digital Modes: N/A
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Video Recording: N/A
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Screen Refresh Rate: N/A
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Digital Screen: N/A
Physical Specs
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Window Size: 0.86 in
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Dimensions: 2.48 × 1.54 × 2.63 in
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Weight: 3.38 oz
Mechanical Specs
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Housing Material: Durable Aluminum
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Surface Finish: MAO
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Adjustment per Click: 0.5 MOA
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Windage & Elevation Travel Range: ±50 MOA
Environment Specs
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Storage Temperature: -40℃ to 70℃
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Working Temperature: -30℃ to 60℃
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Submersion Rating: IP67 Waterproof
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Vibration Resistance: 1000G
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Multi-Reticle System (MRS): Easily switch between a 2 MOA dot, a 65 MOA circle, or a combination of both, allowing rapid target acquisition or enhanced precision based on your shooting needs.
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Shake Awakeâ„¢ Technology: Automatically powers down the LED when idle and reactivates it instantly upon detecting motion, significantly extending battery life and ensuring the optic is always ready when needed.
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Super LED Illumination: Offers a wide range of brightness settings, including options compatible with night vision, delivering a bright, crisp reticle in any lighting condition.
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Lower 1/3 Co-Witness Mount: Includes a purpose-built 1.63" pedestal mount for perfect alignment with standard height iron sights and magnifiers.
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Parallax-Free with Unlimited Eye Relief: Allows for comfortable and fast target engagement from any shooting position without image distortion or eye strain.
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Multilayer Reflective Glass Coatings: Enhances clarity, reduces glare, and improves light transmission for a sharper sight picture.
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Durable Construction: Housed in tough aluminium with a MAO surface finish, the optic is built to withstand rough handling, recoil, and extreme environmental conditions.
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IP67 Waterproof Rating: Fully sealed against dust and capable of withstanding submersion in water, making it reliable in rain, snow, and wet environments.
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Shockproof Design: Rated up to 1000G, providing resilience against heavy recoil and impact.
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Compact and Lightweight: Designed to maintain manoeuvrability and balance on your rifle without adding unnecessary weight or bulk.
- Holosun ARO Advanced Rifle Optic with Multi Reticle System (MRS)
- 1x 1.63" optic mount
- 1x 1.05" optic mount
- 1x Multi tool
- 1x Wrench
- 1x Cleaning cloth
1. What does MRS mean?
MRS stands for Multi-Reticle System, letting you switch between a 2 MOA dot, a 65 MOA circle, or a circle-dot combo depending on the situation.
2. What’s the advantage of the green reticle?
Green tends to stand out more in bright daylight and natural backgrounds for many shooters, making it faster to pick up visually compared to red.
3. Is the ARO enclosed or open?
It’s an open-emitter style optic (not fully enclosed), designed for a wide field of view and lightweight setup.
4. What is Solar Failsafe?
It’s a backup power system that uses ambient light to extend battery life and can help keep the optic running in bright conditions.
5. What is Shake Awake?
A motion-sensing feature that turns the optic off when idle and instantly reactivates it when moved.
6. How long does the battery last?
Up to about 50,000 hours depending on brightness settings and usage.
7. What mount height does it use?
It comes with a 1.63" lower 1/3 co-witness mount for AR-style rifles.
8. Is it compatible with magnifiers?
Yes, the optic is designed to pair well with Holosun magnifiers and similar flip-to-side units.
9. Is it durable?
Yes, it uses a rugged aluminum housing with waterproofing and shock resistance for field use.
10. What’s the main advantage of the ARO Green MRS?
It gives you a flexible reticle system, long battery life, and modern power features in a lightweight rifle optic that’s fast to run and easy to adapt to different shooting distances.
- Holosun 10 years / product lifetime warranty. Read more here
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