On that note:

Most likely 7.62 x 39 for myself.

Was walking down a sidewalk, roughly 100 to 50 feet from a stationary group of people, when a car slowed to a near stop and unloaded on them.

It looked like some kind of Draco, AK-pistol type of weapon, but I did not get the best look, as I was rather preoccupied with jumping into some bushes and then sprinting away.