The Holosun ARO MRS Green Dot Sight (ARO-MRS-GR) is a compact enclosed-emitter rifle green dot sight with Holosun's Multi-Reticle System — a 2 MOA green dot, a 65 MOA circle, or both as a circle-dot — behind a 22 mm objective, supplied with both a lower-1/3 co-witness mount and a low mount.
ARO stands for Advanced Rifle Optic. The MRS is the reticle-switching member of the range: the 65 MOA circle gives you something large to find fast at close range, while the 2 MOA dot on its own keeps the aiming point precise further out. The human eye is most sensitive to green, so a green reticle often appears brighter than a red one at the same power setting. Shake Awake gives up to 50,000 hours from one CR2032, and the aluminium housing is rated IP67 against water and dust.
How It Compares
The same sight is offered as the ARO MRS red dot sight and the ARO MRS gold dot sight. If you only want one clean aiming dot, the ARO GR2 green dot sight is the single-reticle version of the same 22 mm housing, and the ARO EVO green dot sight steps up to a 26 mm window with Solar Failsafe. For a much larger window again, see the AEMS CORE X2 green dot sight. Browse all enclosed red dot sights, offset red dot sights and straight-pull rifle optics, or read our guide to choosing an optic for an AR-pattern rifle.
Ideal For
- Civilian Service Rifle and practical rifle shooting on straight-pull AR-pattern carbines
- Practical shotgun and 3-Gun stages, where the 65 MOA circle is quick to pick up
- Rimfire, .22LR and pistol-calibre carbine builds wanting a sealed sight at sensible money
- Airsoft skirmishing and training rifles that live outdoors in British weather
Key Features
-
Reticle: Multi-Reticle System — 2 MOA green dot, 65 MOA circle, or circle-dot
-
Emitter: compact 22 mm enclosed emitter, sealed against dust and weather
-
Electronics: Shake Awake motion activation, up to 50,000 hours from one CR2032
-
Illumination: 10 settings — 8 daylight and 2 night-vision compatible
-
Mount: lower-1/3 co-witness mount and low mount, both included
-
Housing: aluminium housing rated IP67 for water and dust resistance
Technical Specifications
| Optic Type |
Enclosed-emitter rifle green dot sight, 1x (non-magnified) |
| Reticle |
Multi-Reticle System — 2 MOA green dot / 65 MOA circle / circle-dot |
| Objective |
22 mm (enclosed) |
| Illumination |
10 settings — 8 daylight / 2 night-vision compatible |
| Click Value |
1 MOA per click |
| Battery |
CR2032 coin cell, up to 50,000 hours runtime |
| Power Management |
Shake Awake motion activation |
| Mount |
Lower-1/3 co-witness mount and low mount (both included) |
| Housing / Finish |
Aluminium, IP67 water and dust resistant |
| Eye Relief |
Unlimited (non-critical eye relief) |
| SKU / MPN |
ARO-MRS-GR / ARO-MRS-GR |
What's Included
- Holosun ARO MRS enclosed green dot sight
- Lower-1/3 co-witness mount, low mount, CR2032 battery, lens cloth and manual
Warranty
Covered by Holosun's manufacturer warranty, handled in the UK by Xtreme Tactical.
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Holosun's warranty.
Frequently Asked Questions
What reticles does the Holosun ARO MRS Green Dot Sight offer?
The Holosun ARO MRS Green Dot Sight uses Holosun's Multi-Reticle System, which switches between a 2 MOA green dot on its own, a 65 MOA circle on its own, and both together as a circle-dot.
Will the Holosun ARO MRS co-witness with AR-pattern iron sights?
Yes. The Holosun ARO MRS is supplied with both a lower-1/3 co-witness mount and a low mount, so you can either co-witness with standard AR-height irons or sit the sight low on a rail.
What battery does the Holosun ARO MRS take and how long does it last?
The Holosun ARO MRS runs on one CR2032 coin cell and is rated for up to 50,000 hours. Shake Awake switches the reticle off when the rifle is still and wakes it the instant the rifle is moved.
Is the Holosun ARO MRS an enclosed green dot sight?
Yes, the Holosun ARO MRS uses a fully enclosed 22 mm emitter and is rated IP67, so rain, dust and debris cannot reach the emitter and block the reticle the way they can on an open reflex sight.
How does the ARO MRS differ from the ARO EVO?
The ARO MRS has a 22 mm enclosed objective and runs on a CR2032 with Shake Awake. The ARO EVO uses a larger 26 mm window, adds Solar Failsafe and finer 0.5 MOA clicks, and is the bigger and heavier of the two.
Is the Holosun ARO MRS night-vision compatible?
Yes. The Holosun ARO MRS has 10 brightness settings, of which 8 are daylight settings and 2 are night-vision compatible, so the reticle can be dimmed far enough to use behind a night vision device.
