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Trijicon Tennebrex Killflash 4 X 32 Rco Acog Scope Anti-Reflection Device

4.7 out of 5 stars 239 ratings
$44.90 with 6 percent savings
List Price: $48.00
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Purchase options and add-ons

Brand Trijicon
Color Black
Style Anti Reflection Device
Product Dimensions 2.01"L x 2.95"W x 8.19"H
Sport Hunting
Material Plastic
Magnification Maximum 4 x
Objective Lens Diameter 32 Millimeters
Magnification Minimum 4 x
Compatible Devices Rifle

About this item

  • Package length: 5.1 cm
  • Package width: 7.5 cm
  • Package height: 20.8 cm
  • Product Type: SPORTING GOODS
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Frequently bought together

Trijicon Tennebrex Killflash 4 X 32 Rco Acog Scope Anti-Reflection Device
This item: Trijicon Tennebrex Killflash 4 X 32 Rco Acog Scope Anti-Reflection Device
$44.90
Get it as soon as Wednesday, Jun 25
In Stock
Sold by Nimrod's Wares and ships from Amazon Fulfillment.
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Trijicon ACOG 4X32 FLIP Cap W/Bosses
$19.59
Get it as soon as Wednesday, Jun 25
Only 16 left in stock - order soon.
Sold by Blue Coop and ships from Amazon Fulfillment.
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Trijicon AC31015 Tenebraex killFlash Anti-Reflection Device, Dual-Illuminated RMR Models, Black
$40.94
Get it as soon as Wednesday, Jun 25
Only 20 left in stock - order soon.
Sold by Hunting_Stuff and ships from Amazon Fulfillment.
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Product Description

TA91  Features: -Anti-reflection device. Item: -Caps/Covers. Type of Sight: -Traditional Rifle Scope/Red Dot Sight/Laser Sight.

Product information

Technical Details

Brand ‎Trijicon
Color ‎Black
Style ‎Anti Reflection Device
Product Dimensions ‎2.01"L x 2.95"W x 8.19"H
Sport ‎Hunting
Material ‎Plastic
Magnification Maximum ‎4 x
Objective Lens Diameter ‎32 Millimeters
Magnification Minimum ‎4 x
Compatible Devices ‎Rifle
Mounting Type ‎Weaver Mount
Night vision ‎No
Model Name ‎TA91
Manufacturer ‎Green Supply
Reticle Type ‎Crosshair
UPC ‎719307302594
Global Trade Identification Number ‎00719307302594
Item Package Dimensions L x W x H ‎5.04 x 2.91 x 2.01 inches
Package Weight ‎0.04 Kilograms
Item Dimensions LxWxH ‎5.75 x 3 x 2 inches
Brand Name ‎Trijicon
Warranty Description ‎Manufacturer
Suggested Users ‎unisex-adult
Number of Items ‎1
Part Number ‎TA91
Included Components ‎KillFLASH anti-reflection device

Additional Information

ASIN B001UCBSNU
Customer Reviews
4.7 out of 5 stars 239 ratings

4.7 out of 5 stars
Best Sellers Rank
Date First Available September 1, 2004

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Trijicon Tennebrex Killflash 4 X 32 Rco Acog Scope Anti-Reflection Device

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Customer reviews

4.7 out of 5 stars
239 global ratings

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Customers say

Customers find the aiming scope sight fits well with the 4x32 Acog and is easy to install. The product is well-made, tough enough for outdoor conditions, and effectively reduces glare from light being captured. They appreciate its value as a superior addition to the ACOG, and one customer notes its nice finish. The visibility aspect receives mixed feedback.

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FitFunctionalityValue for moneyLookEase of installationGlare reductionBuild qualityVisibility
39 customers mention "Fit"32 positive7 negative

Customers find that the scope fits well, particularly noting that it matches perfectly with the ACOG 4x32, and one customer mentions it secures with an o-ring.

"...Optically invisible. Looks sharp. Just slides in and secures with an o ring." Read more

"It’s a must have fit and finish is great" Read more

"...for anyone owning an ACOG, The Killflash has a sleek look, fits snuggly into the scope, has absolutely no ghosting when viewed through the scope,..." Read more

"...Fit is secure and it reduces glare from light being captured by the scope...." Read more

32 customers mention "Functionality"32 positive0 negative

Customers find that the scope works well, with one customer noting it is effective and another mentioning it is useful for its intended purpose.

"Works as advertised. Optically invisible. Looks sharp. Just slides in and secures with an o ring." Read more

"Works great. Used it on my ACOG TA02. ACOG has plenty of light even with this on." Read more

"Works perfectly. The high grade silicone band that attaches this to your scope is very rugged and built to last...." Read more

"...but is eminently useful for it's intended purpose -- to "kill" any reflective flash from light..." Read more

20 customers mention "Value for money"20 positive0 negative

Customers find the scope to be a great value, describing it as a superior addition to their ACOG.

"...Over all this was a superior addition to my ACOG and I would recommend this to all." Read more

"Great Trijicon factory kill flash for a great price!! These usually go for a little over twice what I paid for...." Read more

"...All three are excellent products. Trijicon part # AC11022 for the coat and AC11011 for killFlash. Flip open is a 02 eye, 31.1 mm...." Read more

"This is a great piece of gear for anyone looking to not give away their location...." Read more

19 customers mention "Look"19 positive0 negative

Customers like the scope's appearance, with one noting its great finish.

"Works as advertised. Optically invisible. Looks sharp. Just slides in and secures with an o ring." Read more

"I installed this on my TA31RMR. It looks great on the ACOG and requires no tools to install...." Read more

"It’s a must have fit and finish is great" Read more

"...lens, it also provides protection to the objective lens, and looks damned good doing it...." Read more

15 customers mention "Ease of installation"15 positive0 negative

Customers find the scope easy to install.

"...I said it needs no tools to install, but I purchased this in addition to the quick release mount and installed it while I had the factory mount off..." Read more

"...Second, the "rubber band" method of securing this is quick and easy, but not the most reliable or durable way to affix the KF...." Read more

"Great product well made, easy install took five minutes if that, came in Trijicon packaging, and they even include a company logo auto sticker...." Read more

"Lightweight, easy to install, and necessary if you choose to install a pair of flip up covers for your AGOG scope. I have an ACOG 4x32...." Read more

14 customers mention "Glare reduction"14 positive0 negative

Customers appreciate how the scope reduces glare from light being captured and blocks reflections, with one customer noting it works well with ACOG dual illumination.

"Works great. Used it on my ACOG TA02. ACOG has plenty of light even with this on." Read more

"...This is designed to eliminate all light reflection from the front objective, thereby disclosing your location to any potential enemy, and it..." Read more

"...this device reduce glare through your optic and eliminate reflections off of the objective lens, it also provides protection to the objective lens,..." Read more

"This is a must for those with an ACOG and want to reduce the glare on their scope or want that tactical look...." Read more

10 customers mention "Build quality"10 positive0 negative

Customers praise the scope's build quality, noting it is tough enough to stand up to outdoor conditions, with one customer highlighting its high density plastic construction.

"...The high grade silicone band that attaches this to your scope is very rugged and built to last. I’m not sure what other reviewers were criticizing...." Read more

"...Quality part, order without reservation if required. As stated, no surprises." Read more

"...The construction is a high density plastic, tough enough to stand up to outdoor conditions, but I have concerns the band may not hold up over time...." Read more

"Great product well made, easy install took five minutes if that, came in Trijicon packaging, and they even include a company logo auto sticker...." Read more

11 customers mention "Visibility"6 positive5 negative

Customers have mixed opinions about the scope's visibility, with some reporting no obstruction, while others mention it blocks light and affects the sight picture.

"Works as advertised. Optically invisible. Looks sharp. Just slides in and secures with an o ring." Read more

"...Any deformation shows up through the ACOG and blocks visibility. Lastly, the KF does impact light transmission through the optic, but very nominally...." Read more

"...Absolutly no affect on your sight picture, some say it is like looking through a screen door...." Read more

"...A caution for new users of ARD's; there is some light transmission diminishment in some ambient lighting conditions. The nature of the system...." Read more

Winner
5 out of 5 stars
Winner
Works as advertised. Optically invisible. Looks sharp. Just slides in and secures with an o ring.
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Top reviews from the United States

  • Chris V.
    5.0 out of 5 stars Winner
    Reviewed in the United States on January 29, 2025
    Verified Purchase
    Works as advertised. Optically invisible. Looks sharp. Just slides in and secures with an o ring.
    Customer image
    Chris V.
    5.0 out of 5 stars
    Winner

    Reviewed in the United States on January 29, 2025
    Works as advertised. Optically invisible. Looks sharp. Just slides in and secures with an o ring.
    Images in this review
    Customer image
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  • Matt
    5.0 out of 5 stars Great on ACOG TA02
    Reviewed in the United States on February 28, 2025
    Verified Purchase
    Works great. Used it on my ACOG TA02. ACOG has plenty of light even with this on.
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  • Angryman
    5.0 out of 5 stars Serves its purpose.
    Reviewed in the United States on May 21, 2014
    Verified Purchase
    I installed this on my TA31RMR. It looks great on the ACOG and requires no tools to install. I was a little worried about the rubber band used to install it, but so far it has held up. The band is a stiff rubber material that needs to be stretched over the mount to install. I said it needs no tools to install, but I purchased this in addition to the quick release mount and installed it while I had the factory mount off to minimize the stretching of the band. Since I installed it almost a year go, it has kept the flash hider held snug up to the scope.

    I will also note that the scope coat ordered directly through Trijicon for the TA31RMR has a really lousy fit even without the flash hider installed. With the flash hider installed, the scope coat needs to be stretched to an uncomfortable level, and just barely covers the eye piece.
    11 people found this helpful
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  • K. G
    5.0 out of 5 stars Another Great Trijicon Product!
    Reviewed in the United States on December 14, 2018
    Verified Purchase
    Works perfectly. The high grade silicone band that attaches this to your scope is very rugged and built to last. I’m not sure what other reviewers were criticizing. Maybe Trijicon upgraded from a simple rubberband, but know that it is no longer an issue. The build is solid enough to take some hard bashing and thrashing. The honeycomb polymer is as strong as any kill flash could be. This works perfectly to conceal your scope’s objective lense from your unsuspecting pray while leaving your view through the scope perfectly clear. Even if you’re not hunting or being hunted, this relatively inexpensive device will help protect your prized ACOG objective lense.
    2 people found this helpful
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  • Skyhitoy
    5.0 out of 5 stars A must have
    Reviewed in the United States on October 17, 2023
    Verified Purchase
    It’s a must have fit and finish is great
    Customer image
    Skyhitoy
    5.0 out of 5 stars
    A must have

    Reviewed in the United States on October 17, 2023
    It’s a must have fit and finish is great
    Images in this review
    Customer image
    One person found this helpful
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  • The_Biffster
    4.0 out of 5 stars A novel approach to glare elimination
    Reviewed in the United States on December 20, 2013
    Verified Purchase
    While this is certainly a worthy, if not absolutely necessary addition to any 4x32 ACOG, it is not without potential issues, regardless of how minor. The issues do not, in any way, stem from performance. This is designed to eliminate all light reflection from the front objective, thereby disclosing your location to any potential enemy, and it performs that singular task with absolute perfection. In fact, aside from shining a flashlight directly into the front of the ACOG/KF from a very close distance -- under 10 feet -- you simply can NOT get a KF-equipped ACOG to flare.

    First, this is not designed to protect your front objective, or "look cool." The ACOG's front objective is recessed deeply enough in the rugged housing to prevent any direct contact with any offending item that could do it harm. Second, the "rubber band" method of securing this is quick and easy, but not the most reliable or durable way to affix the KF. For most of us it works just fine, but for those who actually *use* their rifles in very demanding conditions this could be a failure point, resulting in a lost KF. Third, the honeycomb plastic that is the actual functional part of the Killflash is literally paper-thin and is easily deformed. Any deformation shows up through the ACOG and blocks visibility. Lastly, the KF does impact light transmission through the optic, but very nominally. During adequate light this isn't noticeable, but at dawn / dusk it does affect visibility, so you'll want to remove it (you won't need it at those times anyway).

    I'm not down on the Killflash at all, but thought it would be good to apprise any potential buyers of some of the minor things that may or may not be an issue. To be clear, this accessory does ABSOLUTELY NOTHING to enhance the ACOG's function (in fact, under certain conditions the opposite is true), but is eminently useful for it's intended purpose -- to "kill" any reflective flash from light glare and exposing your position to the enemy. If you're like most of us and don't have any "enemies" to worry about, it's a novelty item of little or no real value -- in all honesty.
    69 people found this helpful
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  • Reaper25
    5.0 out of 5 stars great product
    Reviewed in the United States on April 13, 2024
    Verified Purchase
    works great with my acog
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  • Tired Parents
    5.0 out of 5 stars Typical boring Trijicon
    Reviewed in the United States on November 7, 2023
    Verified Purchase
    Like Aimpoint and EoTech, there aren't any unwelcome surprises. Works as designed. A caution for new users of ARD's; there is some light transmission diminishment in some ambient lighting conditions. The nature of the system. Not as noticeable as magnification increases, however. This 4X32 ACOG rubber band system is SO much better than the OEM snap-on party noisemaker for my 3.3X35 ACOG. Quality part, order without reservation if required. As stated, no surprises.
    One person found this helpful
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