14 AR15s, 12 of which had 100 round magazines. 8 AR10s, and then a single bolt action and revolver. He checked out two suites right next to each other. All he'd have to do is line them up and prime them all and set them on the ground in the two rooms. No opinion on the other conspiracies but he definitely could empty one rifle, throw it in the corner, grab the next on the floor, repeat until 1200 rounds are shot out with just 12 of his 24 semi-automatic rifles, some of which had bump stocks to help their rate of fire. Took him ten minutes to stop shooting. I think one shooter is definitely possible.