I listened to the audio of the shooting. Definitely a full auto weapon, probably small caliber (5.56mm). Hard to tell from poor cell phone audio, but most likely a modded AR-15 variant.

Why is any of that legal again?

Las Vegas Shooting: 50 Killed and 406 Hurt Near Mandalay Bay.

An armed society is a polite society, right? RIGHT?

Gun maker stocks are up in pre-market trading.