This is original issue; made by Tenebraex, and distributed by ATI under the Tenebraex name and also from Aimpoint. Same great product.
The ARD flash-kill is made for the Aimpoint COMP series of red-dot sights. The ARD reduces glare off the optic’s objective lens, helping to conceal the operator’s position. This is helpful to the solider, law enforcement officer and enthusiast. While give away your position! The unique honeycomb pattern traps light and all but eliminates glare from the glass lens. The ARD requires no tools, and fits snugly into the body of the Comp M objective lens.
Tenebraex model: M68CCO-ARD
Aimpoint model: 12239