The latest Planet of the Apes viral video – featuring an ape with an AK-47 gun – is still going strong. And it is pretty hilarious.

The video supposedly shows an "uncovered scientific study" of a chimp shooting an AK-47 at a group of shrieking men.

More than four million people have watched the video so far.

Rise of the Planet of the Apes is set in present day San Francisco, and tells the story of how a man’s experiments with genetic engineering lead to the development of intelligence in apes and the onset of a war for supremacy.

Watch the Rise of the Planet of the Apes viral here.

And here's the official trailer.