A Holographic Sight is a non-magnifying gun sight that allows the user to look through a glass optical window and see a reticle image superimposed at a distance on the field of view. The hologram of the reticle is built into the window and is illuminated by a laser diode.'
In game, Holographic Sight have name which always starts with "EOT" prefix. It grants boosts to accuracy and damage, but reduces fire rate. The only exception is AR HK416's unique equipment, the EOT XPS3, which doesn't penalize fire rate; instead it grants greater chance to deal critical damage.
The item names are derived from holographic sights manufactured by EOTech.