Don't think so. Slide fire stock methinks. Possibly an auto glove. Probably pre positioned a few rifles with drums and picked up another weapon rather than reload.
First one was a 50-75 rd drum while music playing. Very slow reload to the next magazine. Probably not a second shooter which would start firing when the other shooter stops. Very VERY slow reload. Probably a slide fire stock or auto-glove that makes semi's bump fire (similar to full auto) and hard to reload.
There is a video on twitter that makes me believe this is an auto glove due to variable ROF (rate of fire) going up and down. Either that or there were two rifles being shot at once.
The cops at the press conference said numerous weapons were in the hotel room. Hard to tell at the distances and buildings, but some of the shots sound pretty heavy like a .308. But as another Freeper mentioned, some guy said his friend was shot three times in the chest and they took him to the hospital - so that probably wasn’t .308 rounds.
Good thinking. Me and some others said M-60 based on the sound from some tapes. I haven’t seen the calibers used yet.