I'd love to read more about the process of contractors acquiring those special rights. Maybe you got some further reading?
Then for the US I'd switch to this: https://www.justice.gov/sites/default/files/usao-me/legacy/2...
And after that I would probably look through the Federal Register for references to any executive orders concerning the extra-territorial use and possession of firearms by non-law enforcement personnel.
https://www.theguardian.com/world/2019/jan/25/venezuela-madu...
The country may be poor but the budgets are still in the billions or tens of billions. x% goes to the leaders, plus a lot more for permits, buying state enterprises, telecom licenses, solve tax issues etc etc...