“No doubt there will be a lot more learned from these recordings.”
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With the authorities inability or unwillingness (or both) to get to the bottom of the attack, all the video and audio will be scrutinized by audio hobbyists and theorists for a long, long time to come. It’s grassy knoll deja vu time all over again.
Those ~100 bursts seem to have a very tight shot to shot period. Likely tough to accomplish with a bump-fire stock.
The FBI and LVMPD talking heads are not sharing much and likely just throwing stories out to see if it quells the waves.
They are not helping their case for competency.