Live-Fire Test - How hard is it to shoot down a drone with a fully automatic rifle? How about 100 fully automatic rifles?

YouTube user TAOFLEDERMAUS has provided some background on the video here:

This was filmed in Arizona at the Big Sandy Machine Gun shoot.
For more information on how to see this event yourself, which happens twice a year, check out their website.
http://mgshooters.com/

PopSci.com ran a little story about this video on their website:
http://www.popsci.com/article