During the exploration of King's Canyon, you can encounter special Apex ticks. Destroying them drops items of better quality, so it is recommended to look closely around the area that you are currently exploring.
Where to search for Apex ticks and how to unlock them?
Apex ticks are found in random locations around King's Canyon. We can assume that they appear in small rooms and bigger buildings. Most cases, they are hidden in the corners or behind walls. To destroy an Apex tick, all you have to do is fire at it or perform a melee attack.