[Trooper117]

In at least two of those shots its certain that they are firing blank ammunition.. Firing blanks always produces a much higher muzzle signature.. so don't count those
I teach weapons and go on the ranges and field firing on a weekly basis.
It's very easy to take a split second picture and show a flash as the gun is fired.. in reality, during the day, as your eyes are not a digital camara, you don't see this massive flash that the camera picks up!
but as I say, blanks give a much bigger signature than live ammunition..