Holosun ARO-RD2 Advanced Rifle Optic – 2 MOA Red Dot

The Holosun ARO-RD2 is a compact, lightweight red dot sight that advances the proven 20mm Holosun 403 and 503 series with a new 22mm housing for expanded field of view and optimal compatibility with magnifiers. Engineered for agility and precision, the ARO-RD2 features a crisp 2 MOA red dot, rugged aluminum construction, and the reliability shooters trust from Holosun optics.

Built with Shake Awake™ Technology and offering up to 50,000 hours of battery life on a single CR2032, this optic stays ready when you are — whether you’re running drills at the range or storing your firearm for home defense. The ARO’s lower 1/3 co-witness mount ensures comfortable alignment with your backup iron sights, and its updated design pairs perfectly with Holosun magnifiers for enhanced versatility.

Its intuitive motion-sensing system powers the LED off when not in use and back on instantly with the slightest motion, ensuring the dot is always ready without fumbling with buttons. Lightweight, durable, and field-ready — the ARO-RD2 is an ideal upgrade for any AR or PCC platform.

Key Features:

• 2 MOA Red Dot: Clear and precise aiming for fast target acquisition
• Shake Awake™ Technology: Automatic on/off with motion detection
• 50,000-Hour Battery Life: Powered by a single CR2032
• 10 Daylight + 2 Night Vision Brightness Settings
• Parallax-Free with Unlimited Eye Relief
• Rugged Aluminum Housing: With MAO finish and IP67 submersion rating
• Compact & Lightweight: Only 3.38 oz
• Co-Witness Ready: Includes 1.63" lower 1/3 mount & 1.05" low mount

Specifications:

• Reticle: 2 MOA Red Dot
• Light Wavelength: 650nm
• Magnification: 1x (Parallax-Free)
• Brightness Settings: 10 Daylight, 2 Night Vision
• Battery: CR2032 (up to 50,000 hours)
• Power Source: Battery only
• Housing Material: Durable Aluminum
• Surface Finish: MAO
• Mounting Height Options: 1.63" (Lower 1/3) and 1.05" (Low Mount)
• Window Size: 0.86"
• Adjustment per Click: 0.5 MOA
• W&E Travel Range: ±50 MOA
• Dimensions: 2.48" × 1.54" × 2.63"
• Weight: 3.38 oz
• Operating Temperature: -30℃ to 60℃
• Storage Temperature: -40℃ to 70℃
• Waterproof Rating: IP67
• Shock Resistance: 1000G

✔️ What’s in the Box:

• 1x Holosun ARO-RD2 Optic (Red Dot)
• 1x 1.63" Lower 1/3 Co-Witness Mount
• 1x 1.05" Low Profile Mount
• 1x Multi-Tool
• 1x Mounting Wrench
• 1x Cleaning Cloth

Step up your rifle setup with precision and speed — order the Holosun ARO-RD2 now at Terran Gear USA.

Holosun Technologies ARO, Red Dot, 2 MOA Dot, Fits 1913 Picatinny Rail, 1.63" Lower 1/3 Co-Witness Mount, Black ARO-RD2