Holosun ARO MRS Enclosed Green Rifle Sight — MRS

Holosun ARO MRS Enclosed Green Multi-Reticle Rifle Sight is a compact, enclosed 1x rifle optic that provides a selectable green 2 MOA dot, 65 MOA circle, or combined circle-dot reticle. Designed as a non-magnified primary sight, it delivers fast target acquisition and a clear sight picture for close- to mid-range rifle applications.

Built by Holosun, the ARO MRS addresses the need for a durable, low-power optic that performs reliably on modern rifles. Its enclosed design protects the emitter and optics from dust, debris, and weather, while the 22mm objective and unlimited eye relief provide a wide, forgiving field of view. The optic is intended for AR-style rifles and other long guns where a lightweight, always-ready reflex sight is preferred.

Key Features

• Enclosed rifle reflex sight with green Multi-Reticle System (MRS)

• Selectable reticles:

  • 2 MOA green dot

  • 65 MOA green circle

  • Combined circle-dot configuration

• 1x magnification with unlimited eye relief

• 22mm objective lens for a broad, unobstructed sight picture

• CR2032 battery power with manufacturer-stated long runtime

• Shake Awake motion activation to conserve battery life

• Automatic shutoff after inactivity

• 12 brightness settings, including two night-vision-compatible modes

• Parallax-free design for practical accuracy at typical rifle distances

Specifications & Construction

The ARO MRS is constructed from anodized 6061 aluminum in a sealed, enclosed housing designed for durability and recoil resistance. It operates at 1x magnification and uses a 22mm objective lens. The reticle system offers a 2 MOA dot and 65 MOA circle in green illumination. Power is supplied by a single CR2032 battery. The optic weighs approximately 5.56 oz and is rated IP67 for dust and water resistance.

Compatibility & Intended Use

This optic mounts directly to 1913 Picatinny rails and is compatible with Picatinny/Weaver mounting systems when properly configured. A lower 1/3 co-witness pedestal mount is included to support alignment with backup iron sights and a consistent cheek weld. Typical applications include AR-15 and similar rifles as a primary non-magnified optic, patrol or duty rifle setups, range and training rifles, or use in conjunction with a magnifier for extended-range capability.

What’s Included

• Holosun ARO MRS Enclosed Green Multi-Reticle Rifle Sight

• Lower 1/3 co-witness Picatinny mount

• CR2032 battery

• Mounting hardware

• Adjustment tool

• Manufacturer documentation