The metal high-intensity flashlight shell accessories, as optical precision parts, are made of high-quality metal alloys (optional aviation-grade aluminum alloys, titanium alloys, etc.). The overall ergonomic streamlined cylindrical structure, the surface is treated with advanced processes such as anodizing and nano-coating, showing a delicate matte texture, and has both anti-corrosion and wear-resistant properties. The front section of the barrel is the optical component adaptation area, the inner wall is smooth and the dimensional accuracy reaches the micron level, accurately undertakes reflective cups, lenses and other optical components; the grip section adopts a non-slip mesh / corrugated design, which fits the hand gripping habits. It provides physical protection and optical path support for the flashlight, adapting to professional outdoor adventures, tactical operations, industrial maintenance and other scenes, helping to stabilize the projection of strong light and ensure clear and efficient lighting.