My buddies set an AK hand guard on fire and made the barrel droop with around 800 rounds of sustained fire. It took a hell of a lot longer than 2 minutes. The one guy is pretty amazing at laying down fire with a semi auto too.
Here is a link of to the video if any of you want proof.
http://www.youtube.com/watch?v=Gs6iS...3929F4&index=7
I think 1000 rounds in two minutes is a pretty good joke.