BFV Eger (89)
The chunky L9A1 SUSAT, which was cutting-edge when introduced in the early 1980s, has since been phased out by the Trijicon ACOG and the Elcan Specter in British service. Note the fixed iron backup sights located atop the sight body. The SUSAT uses an illuminated inverted aiming point that looks something like the Washington Monument.