 This is a 12 or 16-gauge double-hammer, double-barreled shotgun once belonged to John James Audubon. The gun was stolen from the Academy of Natural Sciences of Drexel University in March of 1972. It may have been sold at auction after the year 2000. And this one is mind-blowing to me. The gun is four and a half feet long. That's like a crutch. Is that an assault rifle?