Holosun ARO Advanced Rifle Optic with Multi Reticle System (MRS) - Red Dot
The Holosun ARO Red Dot is a clean, modern rifle optic that keeps things fast and simple while still giving you a bit of flexibility. It uses a 2 MOA red dot with Holosun’s Multi-Reticle System, so you can run just the dot for precision, a 65 MOA circle for speed, or both together depending on the situation. The 22mm window gives you a wider, more comfortable sight picture, and the Shake Awake plus long battery life means it’s basically always ready when you pick up the rifle. It also comes with a lower 1/3 co-witness mount, so it’s already set up for AR-style rifles right out of the box. It’s a straightforward, durable optic that focuses on speed, clarity, and reliability without overcomplicating things.
-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 Awake™ 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: 650nm
- Reticle Colour: Red
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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 Awake™ 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 reticle does the ARO Red use?
It uses a 2 MOA red dot with Holosun’s Multi-Reticle System (dot, circle, or circle-dot combo).
2. What does MRS mean?
MRS stands for Multi-Reticle System, letting you switch between aiming styles depending on speed or precision needs.
3. Is it good for AR-15 rifles?
Yes, it’s designed for AR-style rifles and carbines and includes a lower 1/3 co-witness mount.
4. How big is the sight window?
It uses a 22mm optical window for a wider, clearer field of view.
5. Does it have shake-awake?
Yes, it automatically powers on with motion and shuts off when idle to save battery.
6. How long does the battery last?
Up to about 50,000 hours depending on brightness settings and usage.
7. Does it support night vision?
Yes, it includes multiple brightness settings, including NV-compatible levels.
8. Is it enclosed or open?
It’s an open-emitter red dot, not a fully enclosed design.
9. Is it durable?
Yes, it uses a rugged aluminum housing with waterproof and shock-resistant construction.
10. What’s the main advantage of the ARO Red?
It combines a wide field of view, multiple reticle options, long battery life, and automatic power features in a simple, rugged rifle optic that’s easy to run in real-world use.
- Holosun 10 years / product lifetime warranty. Read more here