The traditional sniper rifle light shielding method is similar to the principle of the camera lens hood, which is to add a simple light shielding tube. If you are sniping from a long distance, this is better. However, due to the increasing number of low-magnification or non-magnification optical sights used by foreign military and police forces, AOCG (reflective sights) and CCO (close combat sights) used by conventional infantry in the US military are becoming more and more common. , it is very inconvenient to add a large and thick visor to a lightweight assault weapon. The anti-reflection device (ARD) for optical equipment developed by an American company is referred to as ARD. The registered trademark of the product is called "killFlash?0?3", which means kill flash. killFlash?0?3ARD adopts the traditional sunshade principle, but the structure and materials are novel. Its structure is made of a Nomex honeycomb-shaped porous circular plate reinforced with resin material inside a short aluminum cylinder, which looks like a honeycomb-shaped porous filter plate. When light passes through these small holes and hits the mirror, it is difficult to form a strong large-area reflection, just like installing countless tiny sunshades in front of the lens. However, this Columbus egg-shaped idea and production materials have been applied for patented.

According to official promotional materials, taking the lens of an M144 sniper scope with a diameter of 74mm as an example, the effect of a killFlash?0?3ARD is equivalent to the effect of an 889mm long traditional sunshade tube. However, there are gains and losses. The disadvantage of killFlash?0?3ARD is that this honeycomb filter plate will reduce the light transmission rate in front of the lens, which is said to be reduced by about 15. But in any case, killFlash?0?3ARD's concealment made it favored by special forces as soon as it came out. The US military's special forces were the first to install killFlash?0?3ARD on their ACOG. Now other conventional arms ground combat forces KillFlash?0?3ARD has been used as anti-reflective material on telescopes and sights.

Since the light transmittance will decrease, the requirements for environmental conditions will be correspondingly higher, and the shooting distance will be affected, but it should not affect the accuracy. Because you can only aim if you can see clearly. Since you can see clearly, you should be able to ensure accuracy.