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Holosun HS503CU Red Dot

Red Dot Sight


The HS503GU is a new micro red dot optic equipped with a 65 MOA circle dot reticle with the option of switching to a 2MOA dot only. Our highly efficient light emitting diodes and solar panels allow Holosun solar optics to run without a battery in many lighting conditions. Additionally, the back-up battery lasts up to 5-years on the dot and up to 2 years on the circle dot. The “U” signifies a housing design that shrouds the windage and elevation turrets on two sides.



  • Parallax free with unlimited eye relief.
  • New advanced technology LED  allows up to 50,000 hours of operation on one CR2032 battery
  • 2 MOA dot and a 65 MOA ring
  • Unlimited field of view
  • Parallax-free with unlimited eye relief
  • Powered by both battery and solar
  • Low mount and 1/3 Co-witness mount included



  • Light Source LED
  • Reticle 2MOA Dot & 65MOA Ring
  • Parallax Free Yes
  • Unlimited Eye Relief Yes
  • Magnification 1x
  • Multi-Coatings Yes
  • Integrated Laser No


  • Battery Type CR2032
  • Battery Life Up to 50,000 Hours
  • Brightness Setting 10 Daylight & 2 NV Compatible


  • Housing Material 6061 Aluminum
  • Surface Finish MAO
  • Housing Color Black
  • Adjustment per Click 0.5 MOA
  • W&E Travel Range ±50 MOA
  • Storage Temperature -40? - 158?
  • Working Temperature -22? - 140?
  • Submersion IP67
  • Vibration Up to 1000G


  • Window Size 20mm Diameter
  • Dimension (in) 2.44 x 1.18 x 1.45
  • Weight (oz) 6.3
  • Central Height (in) 1.63
More Information
Product Type Red Dot Sight
Manufacturer Holosun
Magnification 1x

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