Footage out of Myanmar (Burma) shows various groups of Karenni fighters of the KGZ firing upon military junta positions with various small arms.
It's interesting to see the arsenal these fighters are using. One may assume these guys would be mostly armed with AK's and other Eastern-developed weapons, and while an AK and SKS are visible, the majority of the weapons appear to be Armalite AR15/M4/M16 pattern rifles with oddball accessories .
Some OSINT forums have suggested that the rifles are ancient Vietnam War era M16s with upgraded parts, and others may be Chinese clones.
The Buddhist Burmese government has oppressed the mostly Christian Karen people for decades, outlawing their languages, churches, and killing civilians at random. The Karenni militia groups were formed to defend the people from the government attacks.
Following the Feb. 1, 2021 Myanmar military coup against the democratically-elected government, massive protests, strikes, and rebel factions sprung up across the country from all sects and religious groups. The military junta has responded with ever-increasing violence in an attempt to quell the uprisings by conducting targeting operations to arrest and disappear teachers and local government officials that, they say, are fueling the dissent.