On display in the static at the 2004 MCAS Beaufort Airshow, this is the McDonnell Douglas/Northrop mast mounted sight which forms a major part of the OH-58D's increased capabilities.
Remanufactured from an OH-58A Kiowa airframe, this Kiowa Warrior was seen in the static display at the 1993 Edwards AFB Open House. Operated by the Edwards based USAAEFA unit, this helicopter seems to sport a few non-standard additions.