An Antireflective Device (ARD), also known as a kill flash, is a cover that is put over the front of an optic for concealment, reducing lens glare and chances of reflection. Additionally, an ARD protects your optic lens from scratches, dirt, debris, and can also reduce light entering the optic in bright conditions improving clarity. Built for durability, easy to install, and compatible with a wide range of optics, a kill flash offers essential protection and stealth at a low cost.