Primary Arms SLx 25mm Red Dot Anti-Reflection Device

Manufactured by Primary Arms
MPN: 210017
Manufactured by Primary Arms
3 Reviews

In Stock

Orders of non-FFL items will ship within 1 business day. FFL orders will ship within 5 business days if transfer details are provided.

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Anti-reflection devices have been used in military and police applications for many years to eliminating excess scope glare and hide any glint as to not give away your position. However, these devices have many more practical advantages for the everyday user. Eliminating scope glint can also be helpful in hunting situations as bright reflections can possibly scare away deer. It also is extremely helpful in keeping your glass clean from dirt and debris that can possibly scratch the lens. This anti-reflection device is made from anodized black aluminum and is easily installed by screwing it into the objective lens. This model only fits the Primary Arms SLx 25mm red dots.


  • Only fits Primary Arms SLx 25mm Red Dot models
  • Eliminates glare and glint off the front lens
  • Protects scope lens from dirt and debris
  • Made from durable anodized black aluminum
  • Easy to install

Built on the foundation that customer service is the most important product/service a company can offer, Primary Arms is dedicated to meeting the need of every customer with the utmost respect. Not only do they provide excellent customer service, they offer fast shipping and competitive prices on everything they sell. If the foundation is customer service, then the structure is the increasing line of high quality, dependable optics designed right here in Texas. The goal; to provide firearms enthusiasts, professional shooters, and servicemen and women the right tools for the job at an affordable price.
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BrandPrimary Arms
Optic SeriesSLx
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

3 reviews

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Works well, if you can get it to install

by -

At first, I could not get this thing to thread and was about to return it, but then I noticed there's a little rubber gasket that at the edge of the threads that seemed to be protruding from its groove too much on one side, and this was preventing the threads from catching. I went ahead and just removed the gasket, and it installed perfect. It's pretty surprising how well this works. Once you focus on your target downrange, the honeycomb is virtually invisible. Definitely can't see it if you're using a magnifier. Would recommend.

Where the Sun Don’t Shine


I’m glad PA made these for their optics. They really do what they’re supposed to do.. anti reflection. I first had these similar concepts on my Aimpoints back in my Marine Corps days and they really work. Highly recommended. Thanks PA. Semperfi

Awesome product


Does what it’s supposed to do. Quick and simple. It’s a must have since the red objective lens is so noticeable to the human eye. You can sorta see the honeycomb looking through the optic, but just focus on the reticle/target and you’ll hardly notice it. Under magnification it’s impossible to see it.