The Holosun ARO (Advanced Rifle Optic) brings a major step forward in the trusted 403/503 series design with a larger 22mm housing for a wider field of view and a 1.63" lower 1/3 co-witness mount that pairs perfectly with Holosun magnifiers. This version features Holosun's Multi-Reticle System (MRS) with a bright Gold reticle-switchable between a 2 MOA precision dot and a 65 MOA circle-dot for faster target acquisition. With 50,000 hours of battery life, Shake Awake with last-setting recall, and IP67 waterproof construction, the ARO is designed to perform in demanding conditions while staying compact and ultralight at just 3.38 oz. Whether you're training, hunting, or setting up a defensive rifle, the Holosun ARO delivers top-tier performance in a sleek, versatile package. Specifications Model: Holosun ARO (Gold Reticle, MRS) Reticle: 2 MOA dot & 65 MOA circle (switchable) Magnification: 1x Window Size: 0.866" Adjustment: 1/2 MOA per click, 50 MOA total travel Brightness Settings: 10 daylight + 2 night vision Battery: CR2032, up to 50,000 hours Housing: Aluminum, matte black Waterproof Rating: IP67 Mount: 1.63" lower 1/3 co-witness pedestal mount (included) Dimensions: 2.48 (L) x 1.54 (W) x 2.63 (H) Weight: 3.38 oz Included ARO Gold Dot Optic 1.63" Lower 1/3 co-witness mount CR2032 Battery User Manual