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Holosun HS403B Red Dot Sight


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Holosun HS403B Red Dot Sight

The HS403B is a 20mm micro optical sight designed for rifle and carbine applications. Features include 12 brightness settings, Holosun’s Super LED with up to 50K hour battery life, and 2 MOA Dot.   Includes lower 1/3 co-witness and low profile mounts.


  •  2 MOA Dot Reticle
  • 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
  • Shake Awake Technology Auto-Shut Off
  • Super LED Technology
  • Multilayer Coated Lens


Optical Data

  • Reticle                                    2 MOA Dot
  • Light Wavelength                 650nm
  • Reticle Color                         Red
  • Parallax Free                        Yes
  • Unlimited Eye Relief            Yes
  • Magnification                       1x
  • Multi-Coatings                     Yes

Electronic Data

  • Power Source                      Battery
  • Battery Type                        CR2032
  • Battery Life (Hours)           50 000
  • Brightness Setting             10 DL&2 NV

Physical Data

  • Window Size                        20mm Diameter
  • Dimension (in)                    2.45×1.43×1.6
  • Weight (oz)                          2.82

Mechanical Data

  • Housing Material                6061 T6 Aluminum
  • Surface Finish                     MAO
  • Adjustment per Click         0.5 MOA
  • W&E Travel Range             ±50 MOA

Environment Data

  • Storage Temperature        -40℃~70℃
  • Working Temperature       -30℃~60℃
  • Submersion                         IP67
  • Vibration                              1000G


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