We’ve created these threaded anti-reflective devices in nearly every objective lens size, each featuring scores of tiny, light-transmitting honeycomb baffles that reduce lens glare without obscuring your sight picture. Models are available to fit pre-2004, unthreaded objective lenses also.
Amazon.com Product Review
The right tool makes even the most difficult or tedious job easier. Enter the Leupold Mark 4 anti-reflection device (ARD), which features scores of tiny, light-transmitting honeycomb baffles designed to reduce lens glare without obscuring your sight picture. This particular ARD--which measures a mere 1/4-inch deep--fits Leupold's pre-2004 lenses, and reduces glare as effectively as a 7-inch lens shade but without the overhang. The ARD comes with Leupold's full lifetime guarantee.
Product Features
Anti-reflection device designed to reduce lens glare
Bill Christopher "Mr.Bill" (houston) - See all my reviews
Amazon Verified Purchase(What's this?)
This review is from: Leupold Mark 4 Anti-Reflection Device (Ard) (Pre-2004) 52292 (Sports)
I have one in a Hawke 42mm tac scope, and it is a perfect fit inside the lens bell. I also put a Butler creek flip cover over it to complete the set up.You won't find a better one cheaper anywhere else,...unless you steal it...:)
Good Product, but think about what you are purchasing, February 11, 2010
Clinton A. Wilson - See all my reviews
Amazon Verified Purchase(What's this?)
This review is from: Leupold Mark 4 Anti-Reflection Device (Ard) (Pre-2004) 52292 (Sports)
The product is for a Leupold Scope that was manufactured before 2004. If you have a scope made after 2004 this item will not work for you, as the case was with me! My fault,good product.
(2 customer reviews) 
ARD device, November 25, 2011 