The Holosun ARO RD2 (FDE) is a compact enclosed rifle red dot in a flat-dark-earth finish — a clean 2 MOA dot in a sealed 22mm housing that shrugs off dust and weather. It's one of the best-value sealed optics for AR-15s and PCCs.
Shake Awake motion activation gives instant-on readiness and up to 50,000 hours of runtime, and it ships with both a lower-1/3 co-witness mount and a low mount.
How It Compares
Prefer black? See the black ARO RD2. Want selectable reticles? The ARO MRS. Browse all enclosed red dot sights, build via AR-15 optics, and read best AR-15 optics.
Key Features
- Compact 22mm enclosed emitter; clean 2 MOA red dot
- FDE finish
- Shake Awake motion activation
- Lower-1/3 co-witness + low mount included
- Up to 50,000 hours; IP67
Technical Specifications
| Reticle |
2 MOA dot (red) |
| Objective |
22 mm (enclosed) |
| Brightness |
8 day / 2 NV |
| Click Value |
1 MOA |
| Battery |
CR2032 (up to 50,000 h) |
| Mount |
Lower-1/3 co-witness + low mount |
| Housing |
Aluminium, IP67 |
| Finish |
Flat Dark Earth (FDE) |
What's Included
- Holosun ARO RD2 red dot (FDE)
- Lower-1/3 mount + low mount, CR2032 battery, lens cloth, manual
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
Is it enclosed?
Yes — a sealed 22mm emitter for all-weather reliability.
Same as the black version?
Yes — identical optic, finished in flat dark earth.
Does it co-witness?
Yes — it ships with a lower-1/3 co-witness mount and a low mount.
