[BlueDragon]

At the link posted in #360, it sounded tome like not more than fifty rnd string. It didn't seem all that "slow" to me either.

wiki says AK 47 (7.62x39mm) rate of fire;

Cyclic rate of fire:
600 rds/min[7]
Combat rate of fire:
Semi-auto 40 rds/min[7]
Bursts 100 rds/min[7]

AK 74 (5.45×39mm) rate of fire;

Cyclic: 600-650 rounds/minM[4]
Practical:
Automatic: 100 rounds/minM[5]
Semi-auto: 40 rounds/min[5]

M4 Carbine;

700–950 round/min cyclic

M249 light machine gun -formerly known as M249 Squad Automatic Weapon (SAW);

Sustained rate of fire: 100 RPM
Rapid rate of fire: 200 RPM
Cyclic rate of fire: 800 RPM

[Enlightened1]

Here is a good up close video of the sound. Sounds to me like an AK-47.

You may have to click the speaker on the video to hear it.

https://twitter.com/CollinRugg/status/914737490786783232

[Spktyr]

I slowed down a couple of these clips in Quicktime - it had a cyclic rate of about 600 and there was at least one burst where I just stopped counting after 60 rounds. It sounded like something .30 cal or so.

There was also either echoes or a lighter caliber weapon firing short bursts overlaying at least one of the larger gun’s bursts. Could be a second shooter, could be security forces shooting back.

[caww]

Some saying....solo shooter. 32nd floor of Mandalay Bay. Smashed out his window and fired on the concert crowd below LVMPD immediately counter-attacked and put the shooter down in his room. Situation contained. There are no other suspects and there were no other shots fired, elsewhere on the Strip

[Gene Eric]

The M60 also fits the rate profile heard in the videos.