Developed through close and comprehensive collaboration with leading police (SWAT, C.R.T.) units, Israeli special forces, and shooting instructors from all over the globe, T.A.S. sights are the choice of both professionals and hobbyists for a revolutionary, cost effective, low profile aiming solution that facilitates quick, instinctive, and accurate shooting. The sight provides extremely rapid and intuitive target acquisition with both eyes open and in any shooting position. High first hit probability when shooting under pressure. The unique design delivers clear target indication with minimal interference between the target and surroundings, resulting in greater shooter safety and broadened awareness. The aiming points illumination is achieved by use of a fiber optic collector system that channels natural light. The sight does not use any batteries