Description
The Tenebraex SunGuard ARD is a honeycomb anti-reflection device that sits inside your objective flip cover and does two jobs at once: it hides the mirror-like reflection off your front lens and it shades the glass from sun coming in at an angle. This exact version drops into Butler Creek Flip-Open covers sized 39, 40, and 43, so it fits a wide range of common hunting and tactical scopes without adding a long, snag-happy sunshade out front.
The tech behind it isn't a gimmick. Tenebraex ARDs use the same anti-glint honeycomb design trusted by military and law enforcement optics, and the tight cell grid absorbs and breaks up light before it can bounce back off your objective. That reflection is the flash of light that can spook a mature buck at the worst possible moment or betray a shooter's position in the field. The company's proprietary XLUME coating darkens the honeycomb further to soak up stray light and knock down internal glare when you're looking into the sun.
Fitting the SunGuard ARD to Your Butler Creek Cover
Installation is straightforward. You gently push the SunGuard disk into your Butler Creek Flip-Open cover with the small end of the ARD facing forward, seat it against the inner ring, then press the cover onto your scope like normal. A thin plastic ring is included for the handful of scopes with a thin objective edge that won't support the ARD on its own. It's a tool-free setup that takes a couple of minutes.
Living With the SunGuard ARD in the Field
Beyond the anti-glint benefit, that honeycomb also acts as a shield for your front glass against sand, dust, and grime. Flip the cap closed and everything stays protected. When the honeycomb gets dirty, pull it out, rinse it under clear water, and blow it dry. Treat it like any quality optical surface and it'll ride along for years. Keep in mind a fine honeycomb does slightly cut light transmission, which is the tradeoff for killing reflection, so it shines most for hunters and field use where staying hidden matters more than squeezing out every last photon on a target range.
Key Specifications
- Manufacturer: Tenebraex Corp
- Manufacturer Part Number: SG5000-ARD-FP
- UPC: 813545000059
- Type: Objective-side anti-reflection device (ARD)
- Compatible Cover Sizes: Butler Creek Flip-Open 39, 40 & 43
- Fitment: Fits inside Butler Creek Flip-Open covers
- Technology: Anti-glint honeycomb with XLUME light-absorbing coating
- Color: Black
- Mounting Position: Objective (front) lens
- Installation: Tool-free, press-in
What’s Included
- Tenebraex SunGuard ARD honeycomb disk
- Thin plastic support ring
Frequently Asked Questions
What covers does the SunGuard ARD 39, 40 & 43 fit?
This SunGuard ARD is sized to drop inside Butler Creek Flip-Open objective covers numbered 39, 40, and 43. It does not include the flip cover itself, so you'll want the matching Butler Creek cap on hand. Check your scope's objective size against the Butler Creek chart to confirm which number fits your optic.
How does the SunGuard ARD reduce scope glare and reflection?
The disk uses a fine anti-glint honeycomb grid, the same style of technology used on military and law enforcement optics, to break up and absorb light before it reflects off your front lens. That cuts the tell-tale flash that can spook game or reveal your position. The XLUME coating on the honeycomb darkens it further to soak up stray light and reduce internal glare when shooting toward the sun.
Does the SunGuard ARD affect the sight picture?
A honeycomb ARD does slightly reduce the light coming through your scope, which is the normal tradeoff for killing reflection. Most hunters won't notice it in typical field light, and it's most at home where staying concealed matters. For pure bench work in low light some folks prefer to run without it and pop it back in for the field.
How do I install and clean the SunGuard ARD?
Push the ARD into your Butler Creek cover with the small end facing forward until it seats against the inner ring, then press the cover onto your scope. Use the included thin plastic ring only if your scope's objective edge is too thin to hold the ARD in place. To clean it, remove the disk, rinse it in clear water, and blow it dry, treating the honeycomb like any fine optic.




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