The Holosun AEMS CORE X2 Red Dot Sight (AEMS-CORE-X2-RD) is an enclosed-emitter rifle red dot sight with a single 2 MOA red dot reticle, a 1.1 × 0.87 in (28 × 22 mm) viewing window and a lower-1/3 co-witness mount supplied in the box.
It is the simplest member of the AEMS CORE X2 line: no Multi-Reticle System and no solar panel, just one clean aiming dot. The X2 optical system reduces parallax by up to 50% against the previous generation, and Shake Awake wakes the sight on movement to give up to 50,000 hours of runtime from a single CR2032.
How It Compares
Step up to the AEMS PRO X2 red dot sight for the Multi-Reticle System, Solar Failsafe and a forward light sensor, or move across to the AEMS CORE X2 green dot sight if you prefer a green reticle. For a smaller, lighter open-emitter alternative see the ARO MRS red dot sight. Browse the full range of enclosed 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 large window makes target pick-up fast
- Airsoft skirmishing and training rifles that need a sealed, weatherproof dot
- Range, target and gallery rifle work where one uncluttered aiming dot is preferred
Key Features
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Reticle: single 2 MOA red dot, no reticle switching
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Emitter: fully enclosed and sealed against rain, mud and debris
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Glass: X2 optical system, parallax reduced by up to 50% over the previous generation
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Electronics: Shake Awake motion activation, up to 50,000 hours from one CR2032
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Illumination: 10 daylight brightness settings plus 2 night-vision settings
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Mount: lower-1/3 co-witness mount included, ready for AR-pattern rifles
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Housing: 7075-T6 aluminium rated IP67 for water and dust resistance
Technical Specifications
| Magnification |
1x (non-magnified) |
| Reticle |
2 MOA red dot (single reticle, no MRS) |
| Emitter Type |
Enclosed emitter |
| Window Size |
1.1 × 0.87 in (28 × 22 mm) |
| Illumination |
10 daylight settings / 2 night-vision settings |
| Click Value |
0.5 MOA per click |
| Battery |
CR2032 coin cell, up to 50,000 hours runtime |
| Mount |
Lower-1/3 co-witness mount (included) |
| Housing / Finish |
7075-T6 aluminium, IP67 water and dust resistant |
| Eye Relief |
Unlimited (non-critical eye relief) |
| SKU / MPN |
AEMS-CORE-X2-RD / AEMS-CORE-X2-RD |
What's Included
- Holosun AEMS CORE X2 red dot sight
- Lower-1/3 co-witness mount, multi-tool, wrench, 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 reticle does the Holosun AEMS CORE X2 Red Dot Sight use?
The Holosun AEMS CORE X2 Red Dot Sight uses a single 2 MOA red dot reticle. It does not have the Multi-Reticle System, so there is no circle-dot option and no reticle switching.
What battery does the Holosun AEMS CORE X2 take and how long does it last?
The Holosun AEMS CORE X2 runs on one CR2032 coin cell and gives up to 50,000 hours of runtime. Shake Awake switches the dot off when the rifle is still and wakes it the instant the rifle is moved.
Is the Holosun AEMS CORE X2 an enclosed red dot sight?
Yes, the Holosun AEMS CORE X2 uses a fully enclosed emitter and is rated IP67, so rain, mud and debris cannot reach the emitter and block the dot.
Will the Holosun AEMS CORE X2 co-witness with AR-pattern iron sights?
Yes. The Holosun AEMS CORE X2 is supplied with a lower-1/3 co-witness mount, which sits the dot high enough that standard AR-height iron sights appear in the lower third of the window.
How does the AEMS CORE X2 differ from the AEMS PRO X2?
The AEMS CORE X2 is the simplified model, with a single 2 MOA dot and no solar panel. The AEMS PRO X2 adds Holosun's Multi-Reticle System, Solar Failsafe and a forward-facing light sensor.
Is the Holosun AEMS CORE X2 night-vision compatible?
Yes. The Holosun AEMS CORE X2 has 10 daylight brightness settings and 2 night-vision settings, so the dot can be dimmed far enough to use behind a night vision device.
