The manufacturer owners manual says the sustained rate of fire is 12-15 rounds per minute. At 15 rounds/min that is 10 minutes for 150 rounds.
There are of course many you tubes videos demonstrating a much higher rate of fire.
You are also assuming the single shooter had 100% accuracy. No misses, which is pretty impressive in hitting small targets in multiple locations at the weapon’s capacity rate of fire. The official account is simply unbelievable.