Holosun EPS Core 3 MOA Red Dot EPS-CORE-RD-3 – Overview –
The Holosun EPS-CORE-RD3 delivers full-size EPS viewing performance in a compact RMSc-footprint optic with a clean 3 MOA red dot. Its enclosed design protects the emitter from dust, debris, and weather, while a forward-facing light sensor automatically adjusts brightness as conditions change. Powered by a side-tray CR1620 battery rated up to 50,000 hours and backed by Shake Awake and Lockout Mode, the EPS-CORE-RD3 delivers dependable, carry-ready performance in a slim, purpose-built package.
– TECH & FEATURES –
Shake Awake™
Multiple Reticle System
Multilayer Reflective Glass
Shake Awake™
Shake Awake Technology is a standard feature on all current model Holosun optics and serves to extend battery life by deactivating the optic’s LED while not in use. A highly sensitive motion sensor works to detect motion keeping the LED powered on during use. This allows for duty or concealed carry with seamless operation throughout your day or shift. At the end of your day or shift when your firearm is stored, the motion sensor will detect a motionlessness state and after 10 minutes (default setting) Shake Awake Technology powers the LED off until motion is again detected. Shake Awake offers settings from 10 minutes to 12 hours depending on the model and can be deactivated altogether if preferred. The slightest touch of the optic instantly reactivates the LED so your Holosun optic is ready when needed.
– Specification –

- Enclosed optic with full-size EPS lens in RMSc footprint
- 3 MOA red dot
- Automatic brightness adjustment
- Shake Awake with Lockout Mode
- Side-tray CR1620 battery
- 6061-T6 aluminum housing
- IPX8 waterproof and 5000G vibration rated
OPTICAL SPECS
| Reticle | 3 MOA Dot |
| Light Wavelength | 650nm |
| Reticle Color | Red |
| Parallax Free | Yes |
| Unlimited Eye Relief | Yes |
| Magnification | 1x |
| Multi-Coatings | Yes |
ELECTRONIC SPECS
| Power Source | Battery |
| Battery Type | CR1620 |
| Battery Life (Hours) | 50000 |
| Thermal Modes | N/A |
| Digital Modes | N/A |
| Video Recording | N/A |
| Screen Refresh Rate | N/A |
| Digital Screen | N/A |
| Brightness Setting | 8 DL & 4 NV |
PHYSICAL SPECS
| Window Size (in) | 0.90×0.63 |
| Dimension (in) | 1.61×1.18×0.97 |
| Weight (oz) | 1.4 |
MECHANICAL SPECS
| Housing Material | 6061 T6 Aluminum |
| Surface Finish | Hard Anodize |
| Adjustment per Click | 1.5 MOA |
| W&E Travel Range | ±30 MOA |
ENVIRONMENT SPECS
| Storage Temperature | -40℃~70℃ |
| Working Temperature | -30℃~60℃ |
| Submersion | IPX8 |
| Vibration | 10000G |
The Holosun EPS Core 3 MOA Red Dot EPS-CORE-RD-3 is a compact, enclosed-emitter pistol optic designed for shooters who demand durability, precision, and dependable performance in a micro footprint. Built for concealed carry, duty applications, and range use, this optic delivers a clean, streamlined design paired with Holosun’s proven reliability.
Featuring a crisp 3 MOA red dot reticle, the EPS Core provides a balanced aiming point that supports both rapid target acquisition and precise shot placement. The 3 MOA dot offers enhanced accuracy at distance while remaining highly visible for fast defensive shooting scenarios. Its enclosed emitter construction protects the optical system from dust, debris, and moisture, ensuring consistent performance where open-emitter designs may be compromised.
The rugged aluminum housing is engineered to withstand recoil and daily carry wear without adding unnecessary bulk to your handgun. The compact profile maintains compatibility with modern slimline and full-size pistols while supporting co-witness capability with compatible iron sights. High-quality, multi-coated glass enhances clarity and light transmission, providing a distortion-free sight picture in various lighting conditions.
Holosun’s efficient LED technology delivers extended battery life, reducing maintenance and ensuring readiness when you need it most. The side-loading battery tray allows for convenient battery replacement without removing the optic, helping maintain zero and saving time.
Whether upgrading a defensive carry pistol or refining a range setup, the Holosun EPS Core 3 MOA Red Dot EPS-CORE-RD-3 offers the durability and performance serious shooters expect. With its enclosed design, precision 3 MOA dot, and trusted Holosun engineering, this optic stands out as a dependable solution for those seeking compact reliability and enhanced shooting confidence.


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