Holosun ARO-RD2 2MOA Red Dot Sight ARO-RD2

The Holosun ARO-RD2 micro red-dot is engineered for shooters who need lightning-fast target acquisition without sacrificing ruggedness or battery life. Building on the proven 20 mm HS403/503 footprint, this next-generation Advanced Rifle Optic upgrades to a 22 mm window, perfectly matched to Holosun’s HM3X/HM3XT magnifiers and supplied with two mounts—a 1.63 in lower-1/3 co-witness pedestal and a 1.05 in low profile—for seamless integration on AR-pattern carbines, PCCs, shotguns, or offset pistol mounts.

Inside the hard-anodized aluminum housing you’ll find a crisp 2 MOA red dot (or optional Multi-Reticle System) projected by a power-sipping LED that runs up to 50,000 hours on a single CR2032. Ten daylight and two night-vision brightness settings pair with unlimited eye relief and true parallax-free 1× viewing, so you can keep both eyes open from CQB distances to mid-range engagements. Windage and elevation adjust in precise 0.5 MOA clicks across ±50 MOA, letting you dial in quickly and hold zero under recoil.

Measuring just 2.48 × 1.54 × 2.63 in and weighing 3.38 oz, the ARO-RD2 disappears on the rail until you need it, then wakes instantly thanks to Holosun’s Shake Awake™ motion activation. Multi-coated optics resist scratches and glare, while the included multi-tool, wrench, and microfiber cloth make setup and maintenance straightforward.

For a compact, duty-ready red-dot sight that combines extended runtime, rock-solid construction, and flexible mounting out of the box, the Holosun ARO-RD2 delivers category-leading performance that keeps you on target and ahead of the competition.