This is the best face shield I’ve ever seen. It attaches directly to the side rails of tactical helmets and solidly lock up or down. Super thick and strong visor. Brand new, with a protective cover, out of box. 250AF-RC Rail-Mount tactical face shield system designed to fit combat helmets with the Ops-Core® side rail system. Aluminum arms that extend the shield outward assist in cheeking a long gun and allows for excellent ventilation. Premium shield coatings feature an anti-abrasion hard coating on the exterior & permanent anti-fog on the interior. Shield length of 6 allows for gas mask clearance. Paulson Part # 5900400. Color Shield: Clear/Attachment System: Black. Attachment System: Plastic Alloy/Aluminum. Weight 1.38 lb. Shield Coatings Exterior: Anti-Abrasion. Shield Thickness 0.250. Attachment Type Rail Mount. Industry Standards NIJ 0104.02. Country of Origin USA. NIJ 0104.02 was established by the National Institute of Justice (NIJ), the research, development, and evaluation agency of the U. Department of Justice, for testing and certifying tactical helmets. These helmets are designed to protect law enforcement, military personnel, and other tactical units from various ballistic threats and impacts. The standard covers multiple protection features of helmets, including resistance to penetration and deformation. The standard also addresses the requirements for face shield attachments, which are crucial components of a comprehensive head protection system. As such, the face shield attachment must undergo rigorous testing to ensure its effectiveness and safety. Some key elements of the testing process for face shields include. Impact Performance: Face shields are subjected to impact testing, such as being dropped from specific heights onto various surfaces to simulate real-world riot conditions. The face shield must demonstrate the ability to withstand these impacts without cracking or compromising the protection it offers. Furthermore, the face shield should resist penetration from sharp objects like knives and other pointed implements. Optical Quality: It is essential for face shields to provide clear and distortion-free vision to the officer. The standard assesses the optical quality of the materials used in the face shield, ensuring that they do not hinder the wearer’s ability to identify threats accurately. This includes requirements related to refractive power, astigmatism, and light transmittance. Fragmentation Resistance: In addition to ballistic threats, face shields are tested for their ability to resist fragmentation. This is crucial because during an explosive event, fragments can pose a significant risk to the wearer’s face and eyes. Durability and Retention: Face shield attachments are evaluated for their overall durability and retention to ensure they remain securely attached to the helmet during normal use. The standard requires the face shield to stay in place even under challenging conditions. Environmental and Chemical Resistance: Face shield attachments must be tested for resistance to environmental factors like temperature variations, humidity, and exposure to chemicals. This is to ensure that the material remains intact and effective throughout the helmet’s service life.