Ghost Recon: Wildlands Collectibles
There are a number of collectibles in Tom Clancy's Ghost Recon: Wildlands, such as: Weapon Cases, Accessory Cases, Skill Points, Bonus Medals or Kingslayer Files. Here are the links to the pages where you can check the exact location of every item of the the specified type.
Update: Added Narco Road Bonus Medals, Skill Points and Weapon Cases.
Each weapon case contains one new weapon that will be added to your ingame arsenal when collected. Check the marker tooltip / description for more info about name or type of the weapon.
Each accesory case contains one additional weapon part that you can use to modify owned weapons. Check the marker tooltip / description for more info about accessory, name, category or weapon compatibility.
Skill points are required to unlock new or to upgrade already owned skills / abilities. Each "Skill Points" item, that can be found, adds 1, 3 or 5 skill points.
In total, there are 30 bonus medals. Bonus medals unlock a unique bonus for a certain skill. A medal is effective only when its related skill has been unlocked.
Kingslayer files don't improve your skills, e.t.c. but they are an additional source of the backstory about Bolivia, the factions, legends...