Couldn't you have done it alone?
If one is familiar with the AR-15 platform and has practiced magazine changes...they should be able to shoot the vast majority of 320 people in a closed space.
This guy hit 103.
It's plausible it's one man. But knowing Jihadis, there are others to be hunted and killed.
Did one guy shoot up the place? Its certainly possible but some eye witness accounts have suggested another person was involved. That will have to be thoroughly investigated and verified. But we know he had been to the club many times before. Was he there by himself during all those visits? Also it is known that he travelled to Saudi Arabia in 2011 and 2012. Did he have some help along the way planning and executing the attack? Was there a domestic handler? At the very least, I think his computer and communications will show some interesting connections to other people.
FYI...A local Orlando TV station is reporting that there could be an arrest in the next few days of someone who allegedly helped the Orlando gunman carryout the mass shooting inside nightclub. It wouldn’t surprise me if they discovered an accomplice.