"Hard Mount "system developed to attach the face shield to Military PASGT helmets. Integral rubber seal provides a liquid barrier at the helmet / shield interface. Shield locks into the stowed or deployed positions and can be released with one hand. Pivot and lock assembly can be transferred to the right or left of the shield for individual preference. Special heavy gauge shield .250" thick. Unparalleled fit and function with existing protective helmets. Attachment is durable and secure for long term use. This shield is certified to NIJ 0104.02, and meets MIL-V-43511C. V-50 Rated for Fragmentation protection. Specifications: Material: Polycarbonate Color: Clear Product Weight: 1 lb 9oz. NIJ 0104.02 MIL-V-43511C V-50 Rated