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Holosun HS403A Parallax Free Red Dot with (Up to 50000hr Battery Life)

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Product Description

No more bump for the battery! The PARALOW HS403A Red Dot scope has no external battery housing. The battery is hidden in the base where is will rarely need to be changed. This elegant design allows the scope to be simply a tube, allowing the maximum field of vision. Aiming with both eyes is now just a reflex and allows you to have maximum situational awareness. This sight includes 50,000 hour battery life, is parallax free, and has a durable PEO/MAO finish. Add to this an auto wake feature that automatically turns on the scope when it is moved and an adjustable 8 hour auto-shutoff. This scope comes with two mounts, a low profile and a AR height lower 1/3 mount. 

Holosun HS403A Parallax Free Red Dot with (Up to 50000hr Battery Life) 

  • Designed for day and night use 
  • New advantage technology LED allows 50,000 hours of operation on one CR2032 battery 
  • 2 MOA on dot size 
  • Reduced training time and ammunition 
  • Unlimited field of view 
  • Parallax-free with unlimited eye relief 
  • Unaffected by extreme weather conditions 
  • Durable and reliable construction 
  • No hazardous materials used 
  • No laser emission that could be harmful to your eyes 
  • Press button brightness setting. 
  • Increased aiming confidence 
  • Black Color


Parts No.

 HS403 UPC 760921087305


 Reflex collimator sight - red dot sight


Light source

 LED (Light Emitting Diode) totally eye-safe wavelength: 650 nm red light

Red Dot Size

 2 MOA -- 1 minute of angle = 30mm at 100 meters / 1.04 inch at 100 yards


 Parallax free: No centering required, aiming with red dot anywhere inside window.

Eye Relief


Night Vision

 3 brightness setting for night version, Setting 1, 2, 3 is for night vision, From setting 4 to 9 are day time setting from dim to bright.


 Multi-layer coating for all lens.






Battery Life

 50,000 hours. Base on setting 6. current is 5uA(micro Ampere). the battery capacity is 250mAHour. 250mAHoursX1000/5uA=50,000  hours

Auto Shutoff

 8 Hours. After sight turn on 8 hours, it will automatically shutoff.


 12 brightness setting include 3 night vision setting from 1 2 3. all setting current reading(from 12 to 1) 179uA 36uA 22uA 13.1uA 8.8uA  5.91uA 4.92uA 4.53uA 4.25uA 4.13uA 4.06uA 4.02uA


Housing Material


Housing Finish

 PEO/MAO housing finish: Plasma electrolytic oxidation (PEO), also known as microarc oxidation (MAO), is an electrochemical surface  treatment process for generating oxide coatings on metals. It is similar to anodizing, but it employs higher potentials, so that discharges[1]  occur and the resulting plasma modifies the structure of the oxide layer. This process can be used to grow thick (tens or hundreds of  micrometers), largely crystalline, oxide coatings on metals such as aluminium, magnesium and titanium. Because they can present high  hardness[2] and a continuous barrier, these coatings can offer protection against wear, corrosion or heat as well as electrical insulation.

Housing Color



Storage Temperature

 -40C to 70C

Working Temperature

 -10C to 50C








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