Holosun ARO Green Dot 2-MOA Reflex Sight – 22mm – Black – ARO-GR2. The Holosun ARO-GR2 (Advanced Rifle Optic – Green Dot) is a compact, durable, and high-performance reflex sight, designed for fast target acquisition and precision shooting. Featuring a crisp 2 MOA green reticle, the ARO-GR2 offers a premium optical experience with parallax-free performance, unlimited eye relief, and a 1x magnification ideal for close to mid-range engagements. Engineered with a lightweight 22mm aluminum housing, this optic seamlessly pairs with magnifiers and comes with two optic mounts- 1.63″ lower 1/3 co-witness and 1.05″ absolute co-witness -making it adaptable to a wide variety of firearm platforms. Built to endure extreme environments, the ARO is IP67 waterproof-rated, vibration-tested to 1000G, and offers up to 50,000 hours of battery life using a single CR2032 battery. Whether you’re mounting it on a rifle, PCC, or tactical carbine, the Holosun ARO-GR2 delivers clarity, resilience, and versatility in a sleek green-dot configuration. 2 MOA Green Dot Reticle : Offers precision and contrast in a wide range of lighting environments. 22mm Window : Compact housing perfect for pairing with Holosun magnifiers. Dual Mounting Options : Includes 1.63″ lower 1/3 co-witness and 1.05″ absolute co-witness mounts. Long Battery Life : Up to 50,000 hours on a single CR2032 battery. Brightness Settings : 10 daylight and 2 night vision-compatible settings. Rugged Design : Constructed from durable aluminum with MAO surface finish. Unlimited Eye Relief : Allows rapid sight alignment from any shooting position. Parallax-Free : Ensures consistent point of impact regardless of eye position. Reticle: 2 MOA Dot (Green). Window Size: 0.86 in. Battery Life: Up to 50,000 hours. Brightness Settings: 10 DL, 2 NV. Finish: MAO (Micro Arc Oxidation). Windage/Elevation Adjustment Range: ±50 MOA. Operating Temperature: -30°C to 60°C. Storage Temperature: -40°C to 70°C. Dimensions: 2.48″ x 1.54″ x 2.63. Weight: 3.38 oz. (1) Holosun ARO-GR2 Optic. (1) 1.63 Lower 1/3 Co-Witness Mount. (1) 1.05 Absolute Co-Witness Mount.