Well, it's already over now, but the gist of it is this- All of the major firearms manufacturers in America set up booths displaying their products (Sometimes the newer additions, sometimes nearly their complete line) and the guests can try any of them. So people get to try out guns they may not see all that often, such as the 500S&W Magnum, the Beretta shotguns that run as much as a car, and (at this particular one) a .45-70 Gatling gun, and several 50BMG rifles. Needless to say, it was fun as hell.