Kill Flash for Holosun HS403B

Custom Anti-Reflection Device for Holosun HS403B

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Snap this Kill Flash onto your Holosun HS403B and eliminate distracting glare and reflections. Whether you’re on the range or in the field, you’ll stay concealed and focused, with no sunlight giving away your position. Designed for a secure, custom fit and all-day reliability.

Installs in seconds—snaps securely onto your optic with no tools
Honeycomb mesh eliminates flash and glare for true concealment
Lightweight nylon 12 construction stands up to hard use and weather
Custom fit for Holosun HS403B—no rattling or shifting
Maintains a clear sight picture while reducing downrange reflections

$24.99

Designed and manufactured in Michigan, USA

every order includes:

Free Shipping

Free Returns

Limited Lifetime Warranty

More from the KillFlash Family:

Sig Sauer Romeo7S

Holosun EPS

Holosun EPS CARRY

EOTECH HWS 552

EOTECH XPS Models

Holosun HS503R & HE503R-GD

Sig Sauer RomeoZero

Sig Sauer Romeo5 Gen 2

Trijicon RMR

Holosun HS403R

Holosun HS503CU

Holosun HS510C

Sig Sauer Romeo5 Gen 1

Holosun HS403C

Holosun HE507K & HE407K

Holosun HE507COMP

Vortex SPARC

Product Details

Honeycomb Mesh Blocks Glare

The precision honeycomb mesh structure cuts down on sunlight and reflections, keeping your optic glass dark and your position hidden. You get a clear view without giving away your location.

Custom Snap-On Fit

Engineered for the Holosun HS403B, this Kill Flash snaps on securely and stays put, even during recoil or rough handling. No tools or adjustments needed.

Lightweight, Rugged Nylon 12

Built from impact-resistant nylon 12, the Kill Flash adds almost no weight to your setup and shrugs off bumps, drops, and bad weather.

free shipping on all orders

Technical Specifications

Material	Nylon 12
Weight	0.06 oz (1.7 g)
Compatibility	Holosun HS403B
Dimensions	1.25 in. x 0.3 in. (32 mm x 8 mm)
Color	Black

Eliminates Glare

Blocks sunlight and reflections to keep your optic glass dark and your position concealed.

Ultra-Lightweight

Adds just 0.06 oz (1.7 g) to your optic—no extra bulk or drag.

Secure Fit

Snaps on tight and stays put, even during heavy use or recoil.

Weatherproof

Nylon 12 construction stands up to rain, mud, and cold.

Frequently Asked Questions

Will this affect my sight picture or clarity?

The honeycomb mesh is engineered to block glare and reflections without distorting your view. You’ll still have a clear, crisp sight picture, but with less distraction from sunlight or downrange reflections. It’s designed for real-world use, so you can trust your optic to perform in any light.

Is installation permanent or can I remove it?

The Kill Flash snaps on and off without tools, so you can remove it whenever you want. It’s designed for a secure fit, but you can take it off for cleaning or storage as needed.

Will it fit other optics?

This model is custom-fit for the Holosun HS403B. For other optics, check our full range of Kill Flash models to find the right fit for your setup.

How durable is the Kill Flash?

Made from tough nylon 12, it’s built to handle bumps, drops, and harsh weather. It won’t crack or deform under normal use, and it’s ready for field conditions.

Does it add much weight to my optic?

Not at all. At just 0.06 oz (1.7 g), you’ll barely notice it’s there. It’s designed to keep your setup light and fast.

Built for Outdoorsmen, By Outdoorsmen

As a local Michigan company, we understand the needs of our community because we use these products ourselves. We're committed to quality, service, and supporting our neighbors.

Free Shipping

On orders over $50

Free Returns

Easy returns within 30 days

Lifetime Warranty

Limited lifetime warranty on all products

American Made

Designed and manufactured in Michigan