The purpose of adding this net to the scope is to prevent reflection from the mirror and expose your position. According to the imaging principle, it will not affect the aiming.
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To add, this picture should be an anti-reflection device for optical equipment (Anti-Reflection
Device) developed by an American company, referred to as ARD. The registered trademark of the product is called "KillFlash?" means kill Flash. The traditional sunshade principle is adopted, 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 surface, 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.