Can anyone fathom out how weapons like this make their way into the hands of terrorists in Nigeria?

These weapons are in boxes marked with serial numbers. Where there are serial numbers there are invoices or receipts. Which means it was imported. This is worrisome and raise questions about where the terror groups are sourcing their heavy weapons.

Weapons proliferation was once linked to the fall of Gadaffi. Libya was at one point the main source of arms to terror groups on the continent. For those unaware of the dynamics ill give a brief explanation:

When NATO bombed the crap out of the Gadaffi regime in 2011, Libya lost control of a large part of the stockpile it had amassed in over 40 years. The CIA made several calls for ground troops to be deployed to secure Gadaffi's amoury from falling into the hand of rebel groups.

The French kicked against sending ground troops, saying it will give the impression Libya was under a NATO occupation, Its just not worth the political capital to do so. The CIA made this call TWICE and TWICE it was shut down. The logic was securing those sites