Things aren't put together yet on how this happened, but the police are investigating. The story begins when Seth Horvitz ordered this nice new TV from musician told police he received a small box on his doorstep and thought it was a stand for the TV. Inside the box, however, he found a black semi-auto Sig 716.

This, if you don't know, is a military and law enforcement weapon. But it seems the box had two labels on it -- one of which was from a Pennsylvania gun store.

"I was confused as to how that kind of mix-up could happen," Hornitz told the Washington Post. "It surprised me to see how easy it would be for a gun to show up on someone's doorstep — not just a gun, but an assault weapon."