Holosun ARO Green Dot Sight 2 MOA Dot
Mix and match across the range: 2 items save 5%, 3 save 10%, 4 or more save 15% on your whole basket.
Fits MIL-STD-1913 Picatinny rails. The 1.63 in mount gives lower 1/3 co-witness with AR-height iron sights.
Not sure it fits your rifle? Ask us before you order
The Holosun ARO Green (ARO-GR2) is the compact 1x rifle dot sight with a 2 MOA green dot, on a 1.63 in lower 1/3 co-witness Picatinny mount.
Green is the colour the human eye picks up most readily, which is why many shooters prefer it in daylight and with astigmatism.
A CR2032 rated at up to 50,000 hours powers the dot, Shake Awake turns it off when the rifle is still and back on when it moves, and the side-loading battery tray means the sight never has to come off the rail for a battery change. There are 10 daylight and 2 night-vision compatible brightness settings, 0.5 MOA clicks and 50 MOA of travel each way.
The aluminium housing has a MAO finish and an IP67 rating, and eye relief is unlimited. For the same sight in red see the ARO red; for gold, the ARO Gold.
The mount clamps to any MIL-STD-1913 Picatinny rail and sets the dot at lower 1/3 co-witness over AR-height iron sights, for AR-15s, straight-pull rifles and railed shotguns. It suits lower 1/3 flip-to-side magnifiers too.
| Type | Compact rifle dot sight, 1x |
|---|---|
| Reticle | 2 MOA green dot |
| Window | 22 mm (0.87 in) |
| Brightness | 10 daylight / 2 night vision |
| Battery | CR2032, up to 50,000 hours, side tray |
| Power management | Shake Awake |
| Click value | 0.5 MOA |
| Adjustment range | ±50 MOA |
| Housing | Aluminium, MAO finish |
| Water resistance | IP67 |
| Mount | 1.63 in lower 1/3 co-witness, Picatinny |
| Finish | Black |
| Brand | Holosun |
| MPN | ARO-GR2 |
A compact green dot for fast daylight pickup. Order the Holosun ARO Green today — ordered in from the manufacturer for you and sent by Royal Mail Tracked 24, with delivery in 7–10 business days.
Explore more: Enclosed Red Dot Sights, Red Dot Sights or browse all Holosun.
| Type | compact rifle dot sight, 1x |
|---|---|
| Reticle | 2 MOA green dot |
| Window | 22 mm (0.87 in) |
| Brightness | 10 daylight / 2 night vision |
| Battery | CR2032, up to 50,000 hours, side tray |
| Power management | Shake Awake |
| Click value | 0.5 MOA |
| Adjustment range | ±50 MOA |
| Housing | aluminium, MAO finish |
| Water resistance | IP67 |
| Mount | 1.63 in lower 1/3 co-witness, Picatinny |
| Finish | black |
| Brand | Holosun |
| MPN | ARO-GR2 |
| Category | Red Dot Sight |
| Barcode | 810047073604 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
The eye is most sensitive to green, so the dot is easy to see in daylight and many shooters with astigmatism find it crisper than red.
One CR2032, rated at up to 50,000 hours, loaded from a side tray.
1.63 in, for lower 1/3 co-witness with AR-height iron sights.
Yes, it has 2 night-vision compatible brightness settings.
It is ordered in from the manufacturer for you and sent by Royal Mail Tracked 24, with delivery in 7–10 business days and £5 tracked UK delivery.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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