if anyone watched the show this last Wednesday, no doubt you were screaming about how anyone could take his Grandpa's 870 and pay twice what a new one cost to turn it into a ghetto blaster.
well, the answers easy, he didn't.
here's a article written by the performer that starred in that story.

http://www.hausofguns.com/2012/07/11/behind-the-scenes-on-american-guns/

in summary, it was a "ragged 870 off the shelf" (the store's shelf) up as the donor, and the "trade in " went home with the "actor"
i always figured the exploding targets for tannerite, but at least some of them are remotely detonated explosives.
the shooter shoots into a berm and they add the explosion later.

whats left to Discover, on the Discovery Channel.
and how's that History coming at the History Channel.
i'm just wondering how they get them gators to play along?