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Killflash Anti-Reflection Device Compatible with Holosun 403/503 Red Dot (Black, 403B / 403C / 503BU)

4.7 (2) Write Review
Free shipping on orders over $29.99

$14.95

$ 6 .99 $6.99

In Stock

About this item

  • Dot Compatibility: The different Holosun dots have different dimensions. Ensure you order the version that exactly matches your red dot otherwise it will not fit.
  • Precise Fitment: Friction fit killflash ARD tightly fits on the end of the chosen optic. This will require some force to install.
  • Reduces Glare: The killflash reduces glare / reflections from the glass on the objective end of scopes. Due to needing to print with the front of the killflash on the print bed, there may be some shine to it which can be minimized by sanding or spray painting it.
  • PETG-CF Material: Carbon Fiber reinforced PETG filment is used to create this product to ensure it withstands higher temperatures than other filaments, such as PLA/PLA+.
  • Original Design: 1700+ products designed and 3D printed in the heart of America in St Louis, Missouri by Hammy3DPrints.


Friction fit killflash ARD tightly fits on the end of a Holosun 403 / 503 optic. This will require some force to install.


Raphaelle Tangco
Reviewed in the United States on February 9, 2025
Product came, fits a little tight but that’s a good thing. Works as described. Haven’t looked but if they have more for flashlights, etc.I would buy again.
Josh Krantz
Reviewed in the United States on April 8, 2025
Not even a close fit for my 503 and product was just a ruff cut piece anyway. What a rip off! Sending it back isn’t even worth my time money time/money wise. Seller should be ashamed.