Targeter

From Lexicanum

Targeters are devices used by Imperial forces, possessing various optical sights, range-finding or prediction systems, etc. The end result is that they allow the user to determine if a target is in range before firing. Targeters are standard equipment of the Imperial Guard's elite Storm Troopers as well as their Inquisitorial counterparts in Ordo Malleus and Ordo Hereticus armies.

Sources

• Warhammer 40,000: Wargear