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Holosun HS503BU Circle Dot, Red Dot

Holosun HS503BU Circle Dot, Red Dot

HS503BU is a Red Dot sight and shooting scope that features the circle dot reticle. “B” signifies that the battery of this night vision optic is in an internal tray accessed through the side of the scope. “U” signifies a housing design that shrouds the windage and elevation turrets on two sides of the shooting scope. Employing new LED technology, the lifetime for one CR2032 battery used in this shooting scope can reach 2 years if left on constantly. However, the motion-based automatic on and off feature extends the battery life dramatically beyond that for the average shooter.


  • Automatic on and off based on motion

  • 2 MOA dot & 65 MOA Circle

  • Unlimited field of view

  • Parallax-free with unlimited eye relief

  • Durable and reliable construction
  • Low mount and 1/3 Co-witness mount included


Reticle                         2 MOA dot & 65 MOA Circle
Parallax                       None
Battery                        CR2032
Battery Life                  20,000 Hours using circle dot at setting 6 50,000 Hours using dot at setting 6
Brightness Setting        10DL & 2NV Compatible
Housing Material           Aluminum
Housing Finish              MAO Finish
Housing Color               Black or Flat Dark Earth
Storage Temperature     -40F to 158C
Working Temperature     14F to 122F
Waterproof                    1m
Dimension                     66x64x37mm with high mount
Weight                           4.8oz

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  • Brand: Holosun
  • Product Code: HS503BU
  • Availability: In Stock
  • $241.49