Look up what various African Park Rangers carry to confront highly-armed poachers of rhinos, elephants etc.
Some of those poachers are well-financed by foreign companies and a few of the Insurgents/ poachers have been known to have anti-rank missiles.
AKMs, FALs (even new DSA FALs) and G3s/HK-91s plus AR-15s or AR-10s (?) are seen among rangers. Good enough for the US, maybe?