Difficult enough with the 2 acre plane at that oblique angle at 500 yards at night without tracers. Probably not very successful.
But with the civilian bump fire toy and sight without magnification, probably extremely sloppy. And the crowd would scatter sooner.
He most likely caused most of the wounded casualties by firing more slowly at them at first with semi-auto, a good rest (bipod or whatever) and longer range sight. Those poor folks probably didn’t know what was happening for some time. There would have been music noise, individuals cheering at the music and not as much attention to perceived fainting.
Many times in the past, people have been hit for some time without realizing that they were hit by small bore fire. Combat soldiers are taught to check themselves by feeling their bodies with with their hands after firefights. Shock, adrenaline and all of that.
“He most likely caused most of the wounded casualties by firing more slowly at them at first with semi-auto, a good rest (bipod or whatever) and longer range sight.”
Sure didn’t hear any slow/aimed fire on the video I watched which opened with Jason Aldean still playing his set until the staccato rapid fire began. It sounded very much FA to me and so I’m greatly surprised to find out it was done with a bumpfire. Any video I’ve seen of that was not able to run a full string of 50 shots together before trigger release.