I hate conspiracy theories! But this one is really irking me. I have multiple gun buddies who are ex military, one of whom is a certified gunsmith, who all swear that what the Las Vegas shooter did would be impossible without a light machine gun.

This all started when an ex-marine buddy of mine swore up and down that the sound in the cell phone videos of the LV shooting could have only been made by an M240 SAW light machine gun.

I thought he was dumb, but then a gunsmith told me the same thing. The sustained rate of fire heard in the videos would be impossible without some kind of belt-fed light machine gun.

I did a little research and the facts do not add up.

The LV shooter fired over 1000 rounds, as well as a few 70-100 round bursts. We know he had a several AR-10s and a couple AR-15s. These guns are not designed for sustained automatic fire, and begin to smoke after 100 rounds, and will catch on fire around 300-400 rounds. Not to mention how notoriously unreliable bump stocks are. The only way I see as possible is if he had 100 round drum magazines on every rifle and was switching rifles as fast as he could. But as we can see in this photo he had 15-round magazines on at least 2 of his guns so this seems unlikely.

And then there is this video. I wouldn't call it proof but that does sound a lot like an M240.

But the thing that bothers me most of all, is that we don't know exactly what guns the LV shooter had because the ATF won't release that information. This is very unsettling.

What do you guys think? Please disprove my theory! I want to be wrong this time.

EDIT: Some great Responses here! Let me just summarize some of the best counter points.

1. M240 SAW is my bad, I think my friend said m240. I just confused myself looking stuff up on google.

2. The echo and the poor quality recording make analysis of the audio very difficult.

3. You cannot hear the gun shots start to cycle up as they would with an open bolt machine gun design.

4. A well made AR-15 has no problem firing hundreds of rounds rapidly.

5. Those are actually 30 and 60 round magazines. The FBI report also included a 100 round magazine.

6. The full list of guns was actually reported, just not immediately. Thank you nonickname87 for the link