OVERVIEW
The HE503CU-GR is a 20mm micro sight designed for rifle and carbine applications. HE503CU-GR features Holosun’s Solar Failsafe technology and our Multi-Reticle System (MRS) which includes a 2MOA dot and a 65 MOA Circle. Holosun’s Green Super LED allows for up to 50k hour battery life with 10 daylight and 2 night vision compatible reticle intensity settings.
The HE503CU-GR housing is made from 6061 aluminum and includes both a lower 1/3 co-witness mount (1.63”) and a low mount (.75”) for low-comb height rifle applications. Additional features include Shake Awake technology, rubber lens covers, and a side battery for the 2032 battery. HE503CU-GR is a versatile sight for users of all levels.
Items Dimensions (in inches)

Green MRS:2 MOA Dot; 2 MOA Dot & 65 MOA Circle
Up to 50,000 Hours Battery Life (Setting 6)
12 Brightness Setting: 10 DL & 2 NV Compatible
Convenient Tray Battery Compartment
Parallax-free & Unlimited Eye Relief
OPTICAL SPECS
| Reticle |
2 MOA Dot & 65 MOA Circle |
| Light Wavelength |
540nm |
| Reticle Color |
Green |
| Parallax Free |
Yes |
| Unlimited Eye Relief |
Yes |
| Magnification |
1x |
| Multi-Coatings |
Yes |
ELECTRONIC SPECS
| Power Source |
Solar & Battery |
| Battery Type |
CR2032 |
| Battery Life (Hours) |
50000 |
| Brightness Setting |
10 DL&2 NV |
PHYSICAL SPECS
| Window Size |
20mm Diameter |
| Dimension (in) |
2.6×1.43×1.6 |
| Weight (oz) |
3 |
MECHANICAL SPECS
| Housing Material |
6061 T6 Aluminum |
| Surface Finish |
MAO |
| Adjustment per Click |
0.5 MOA |
| W&E Travel Range |
±50 MOA |
ENVIRONMENT SPECS
| Storage Temperature |
-40℃~70℃ |
| Working Temperature |
-30℃~60℃ |
| Submersion |
IP67 |
| Vibration |
1000G |
In the Box
Lower 1/3 Cowitness Mount
Low Profile Mount
T10 L Key
Rubber Cover
User Manual
CR2032 Battery
Lens Cloth