Technology has changed with the times and so have combat techniques. Being able to see with both eyes open in everyday life comes naturally for most of use. In combat it is just as important to be able to see with both eyes open. Many optics used by military and law enforcement in the past required that the shooter to close one eye in order to use the optic mounted on their rifle or carbine. EOTech sights have changed the theory in optical sight design. EOTech, now a division of L3 Communications has developed a HOLOgraphic Weapons Sight that features a heads-up full view technology display. The heads-up display eliminates blinds spots and allows both eyes to remain open while in use. Known as the EOTech HWS, these gun sights use state-of-the-art digital electronics with twenty brightness settings that ensure proper brightness in any light condition. EOTech’s magic is the use of a holographic aiming reticle. EOTech makes military, law enforcement and sports/hunting HWS. Many of the EOTech military gun sights such as the model 552 and 553 are compatible with night vision devices and are built rugged. Many of the EOTech red dot sights have been standardized by the DEA, ATF and FBI SWAT. The EOTech 512 is a very popular model with law enforcement as well as civilian shooting sports enthusiasts. The EOTech model 512 is used by many AR15 owners for target shooting and Three Gun Matches.