Holosun ARO-CORE-GR-2 Green Dot Rifle Optic | 2 MOA | 22mm Window
Compact Design. Precision Performance. Dependable Holosun Reliability.
Product Description
Upgrade your rifle's optics with the Holosun ARO-CORE-GR-2, a compact, high-performance green dot reflex sight engineered for shooters who demand precision, durability, and versatility.
Designed for modern rifle platforms, the ARO-CORE-GR-2 combines a crisp 2 MOA green dot, a refined 22mm viewing window, and advanced power-management technology to deliver a clear, dependable aiming solution.
Featuring Holosun's efficient 540nm Green LED technology, the ARO-CORE-GR-2 provides a bright, highly visible aiming reference with excellent contrast across various lighting conditions. Its precise 2 MOA dot minimizes target obstruction while maintaining a clear sight picture for recreational shooting, training, and sporting applications.
The redesigned 22mm optical window provides an expanded viewing area, making it easier to locate the reticle and maintain visual awareness of the target.
Equipped with Shake Awake technology, the optic automatically enters a power-saving state during inactivity and reactivates when movement is detected. Combined with its efficient LED system, the ARO-CORE-GR-2 offers up to 50,000 hours of battery life using a single CR2032 battery.
The convenient side-loading battery tray allows battery replacement without removing the optic from its mount, simplifying routine maintenance.
Constructed from durable aluminum with a protective Micro-Arc Oxidation (MAO) finish, the ARO-CORE-GR-2 is built to withstand demanding conditions. Its IP67 waterproof rating and 1,000G vibration resistance provide additional durability for regular range use.
For mounting flexibility, the optic includes both a 1.63-inch lower 1/3 co-witness mount and a 1.05-inch low mount, allowing users to select the configuration that best suits their rifle setup.
Whether you're upgrading an existing rifle or selecting an optic for a new build, the Holosun ARO-CORE-GR-2 delivers a combination of clear optics, dependable electronics, and practical mounting versatility.
Key Features
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2 MOA Green Dot Reticle: Crisp, high-visibility aiming point designed for precise aiming and quick visual acquisition.
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540nm Green LED Technology: Efficient green emitter provides excellent contrast and reticle clarity in various lighting environments.
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Refined 22mm Optical Window: Enlarged viewing area provides a clear sight picture and improved reticle visibility.
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Shake Awake Technology: Motion-activated illumination automatically reactivates the reticle when movement is detected, helping conserve battery power.
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Up to 50,000-Hour Battery Life: Extended operation using a single CR2032 battery.
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12 Brightness Settings: Includes 10 daylight and 2 night vision-compatible brightness levels.
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Manual Brightness Control: Allows users to adjust reticle intensity according to lighting conditions and personal preference.
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Side-Loading Battery Tray: Convenient CR2032 battery replacement without removing the optic from its mount.
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1x Magnification: Provides a natural, unmagnified sight picture.
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Unlimited Eye Relief: Allows flexible eye positioning while maintaining visibility of the reticle.
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Multi-Coated Optics: Supports optical clarity and consistent viewing performance.
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Durable Aluminum Housing: Lightweight construction engineered for dependable long-term use.
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Micro-Arc Oxidation Finish: Protective MAO surface treatment enhances resistance to wear and environmental exposure.
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IP67 Waterproof Rating: Sealed construction protects internal components against dust and temporary water immersion.
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1,000G Vibration Resistance: Designed to withstand recoil and demanding shooting conditions.
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Dual Mounting Options Included: Includes 1.63-inch and 1.05-inch mounts for flexible installation.
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T1/T2 Mounting Footprint: Compatible with appropriately configured Aimpoint Micro-pattern mounting systems.
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Picatinny Rail Compatibility: Designed for installation on compatible Picatinny rail systems.
Product Specifications
General Information
| Specification | Details |
|---|---|
| Manufacturer | Holosun |
| Model | ARO-CORE-GR-2 |
| Product Type | Rifle Reflex Sight |
| Reticle Color | Green |
| Reticle Type | 2 MOA Dot |
| Housing Color | Black |
| Optic Footprint | T1/T2 Pattern |
| Mounting Interface | Picatinny |
| Included Mounts | 1.63" and 1.05" |
Optical Specifications
| Specification | Details |
|---|---|
| Light Source | Green LED |
| LED Wavelength | 540nm |
| Reticle | 2 MOA Green Dot |
| Selectable Reticle | No |
| Magnification | 1x |
| Parallax | Parallax-Free Design |
| Eye Relief | Unlimited |
| Lens Coating | Multi-Coated |
| Window Diameter | 0.866 Inches (22mm) |
| Brightness Settings | 10 Daylight / 2 Night Vision |
Electronic Specifications
| Specification | Details |
|---|---|
| Battery Type | CR2032 |
| Battery Life | Up to 50,000 Hours |
| Battery Location | Side-Loading Tray |
| Removable Battery | Yes |
| Shake Awake Technology | Yes |
| Automatic Power Saving | Yes |
| Memory Function | Yes |
| Manual Brightness Adjustment | Yes |
| Automatic Brightness Adjustment | No |
| Lockout Mode | No |
| Solar Power | No |
Mechanical & Durability Specifications
| Specification | Details |
|---|---|
| Housing Material | Aluminum |
| Surface Finish | Micro-Arc Oxidation (MAO) |
| Housing Color | Black |
| Adjustment Per Click | 0.5 MOA |
| Windage & Elevation Travel | ±50 MOA |
| Waterproof Rating | IP67 |
| Vibration Resistance | 1,000G |
| Operating Temperature | -30°C to 60°C |
| Storage Temperature | -40°C to 70°C |
Physical Specifications
| Specification | Details |
|---|---|
| Window Diameter | 0.866 Inches (22mm) |
| Overall Dimensions | 2.48 × 1.54 × 2.63 Inches |
| Optic Weight | 3.38 oz |
| Central Mount Height | 1.63 Inches |
| Low Mount Height | 1.05 Inches |
| Mount Weight | 1.73 oz |
| Housing Material | Aluminum |
| Finish | Black MAO |
High-Visibility 2 MOA Green Dot
The ARO-CORE-GR-2 features a 2 MOA green dot designed to provide a precise aiming reference while minimizing target obstruction.
Its 540nm green LED produces a crisp reticle that can offer improved visual contrast for many shooters, particularly in bright daylight and visually complex environments.
The 2 MOA dot provides a balance between precision and visibility, making it suitable for a variety of recreational and sporting shooting applications.
Unlike multi-reticle optics, the ARO-CORE-GR-2 features a dedicated green dot configuration for straightforward operation and an uncluttered sight picture.
Refined 22mm Optical Window
The ARO-CORE-GR-2 incorporates a redesigned 22mm viewing window that provides a clear, open sight picture.
The larger viewing area supports comfortable visual alignment and allows users to locate the reticle without unnecessary visual obstruction.
Combined with its 1x magnification and unlimited eye relief, the optic provides a natural viewing experience suitable for a wide range of rifle configurations.
Shake Awake Technology & Extended Battery Life
Holosun's Shake Awake technology helps maximize battery efficiency while maintaining convenient operation.
After a period of inactivity, the optic automatically enters a power-saving state. When movement is detected, the reticle reactivates without requiring manual activation.
Combined with its efficient LED system, the ARO-CORE-GR-2 delivers up to 50,000 hours of battery life under specified operating conditions.
The side-mounted CR2032 battery tray allows convenient replacement without removing the optic from the rifle.
Flexible Mounting Options
The ARO-CORE-GR-2 includes two mounting configurations to accommodate different rifle setups.
1.63-Inch Lower 1/3 Mount
Provides an elevated optic position commonly used on modern AR-platform rifles.
1.05-Inch Low Mount
Offers a lower optic position suitable for compatible rifle platforms where a reduced mounting height is preferred.
The optic features a T1/T2 mounting footprint and includes mounts designed for compatible Picatinny rail systems.
Built for Durability
The Holosun ARO-CORE-GR-2 is constructed from durable aluminum with a protective Micro-Arc Oxidation finish.
Its lightweight housing provides strength without unnecessary bulk, while the IP67 waterproof rating helps protect internal components against dust and temporary water immersion.
With 1,000G vibration resistance, the optic is engineered for dependable performance under repeated recoil and regular range use.
Weighing approximately 3.38 ounces without the mount, the ARO-CORE-GR-2 offers a compact optical solution for modern rifle platforms.
Included With Purchase
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Holosun ARO-CORE-GR-2 Green Dot Optic
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1.63-Inch Mount
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1.05-Inch Low Mount
Additional package contents should be verified against the manufacturer's specific product listing.
Available at TCOB Armory
Clear Optics. Reliable Performance. Trusted Holosun Quality.
At TCOB Armory, we understand that selecting the right optic means finding the balance between visibility, durability, and practical functionality.
The Holosun ARO-CORE-GR-2 combines a crisp 2 MOA green dot, refined 22mm viewing window, Shake Awake technology, long battery life, and rugged aluminum construction in a compact rifle optic.
Whether you're upgrading an existing rifle, outfitting a new build, or searching for a dependable optic for range use, the ARO-CORE-GR-2 offers the features and engineering that firearm enthusiasts expect from Holosun.
Visit TCOB Armory in Spring, Texas, to explore the Holosun ARO-CORE-GR-2 and browse our selection of premium optics, firearm accessories, and professional customization services.
TCOB Armory | Quality Gear. Trusted Service. Built for Enthusiasts.
Compatibility Note: The Holosun ARO-CORE-GR-2 features a T1/T2-pattern optic footprint and includes mounting options for compatible Picatinny rail systems. Verify compatibility with your firearm and preferred mounting configuration before purchasing. Battery life varies depending on brightness settings and operating conditions. The optic is designed to be parallax-free but may exhibit minor parallax under certain conditions.
