#gunsight  a sight used for aiming a gun
  supertype:  #sight.optical_instrument  a optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument
  subtype:  #battlesight  #open_sight  #panoramic_sight  #peep_sight  #telescopic_sight
  part of:  #gun
  part:  #view_finder__finder  optical device that helps a user to find the target of interest

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