The 3.5x35 LED ACOG is a capable combat optic that delivers meaningful magnification and LED-illuminated reticle performance in a compact, rugged package — and keeping the objective lens from giving away a shooter's position in bright conditions is a practical concern for anyone using this optic in tactical or hunting applications. The Trijicon Tenebraex KillFlash Anti-Reflection Device for 3.5x35 LED ACOG AC11033 is a purpose-built solution that eliminates forward reflection without affecting the optic's performance. The Tenebraex KillFlash AC11033 is manufactured specifically for the 3.5x35 LED Trijicon ACOG objective housing — a precise dimensional fit that seats correctly without gaps around the edges or wobble that would misalign the honeycomb filter with the objective lens. Generic ARD devices that accommodate a range of objective diameters through loose tolerances create gaps that allow forward reflection to escape, resulting in inconsistent anti-reflection performance. The purpose-built AC11033 eliminates those problems with a fit engineered specifically for this ACOG configuration. The Trijicon ACOG anti-reflection device honeycomb structure allows light to pass normally from the shooter's end — the LED-illuminated reticle remains fully functional, the magnified sight picture stays clear and unaffected, and the 3.5x35 ACOG performs exactly as designed behind the KillFlash filter. From the front, the objective lens goes dark. The forward light reflection that an unprotected objective produces in bright sunlight disappears entirely, keeping the shooter's position concealed from targets and game animals who would otherwise catch a glint of reflected light off the objective glass. The AC11033 installs directly on the 3.5x35 LED ACOG objective without any tools required and stays securely in place through the hard field use and recoil that ACOG owners regularly put their equipment through. Trijicon Tenebraex killFLASH Anti-Reflection Device for 3.5x35 LED ACOG AC11033