In that video where he bested the world record you can see him shoot 12 rounds on target in under 3 seconds.
I don't know what the reload portion of that time is but surely its on the net somewhere. Lets say its a second, that would mean he's capable shooting 24 shots in 8 to 10 seconds.
What's the rate of fire some AKs?
Depending on AK, the full auto fire rate, which isn’t the cyclic rated, is about 280-320 rounds a minute. The theoretic cyclic rate , that is rate without resistance is 600 rounds, but that’s not actually achievable