Well the anti-gun group 'Mom's Demand Action' (which still sounds like an adult hookup site) put up this video (comments disabled of course):
Here's their description:
"An AR-15 assault weapon is fired in slow motion with each discharged shell casing representing a major shooting in America."Now carefully watch the video. With all those rounds flying out, there's no finger movement that I can see and almost no recoil. A screencap bring up another question:
The model appears to say XM15-ES2, there's definitely a Bushmaster logo and they're showing the serial #. Now here's a pic of a regular one:
Hmmm. Now I'm no universal expert on AR's but methinks there's some movie magic and just a little bit of dishonesty going on.
So assuming all those are true, we have another case of an anti-gun group deliberately misrepresenting firearms to push a political agenda, using emotion, not facts, to make their case.