The character acted ashough he never handled a gun, and that's impossible it's 3000 AD in America of all places, top country of war, violence and crime. He didn't sign up for this, but raffled, as population control. After the war ended you'd think that population wasn't a problem, but the numbers have been calculated by a large number of scientist (robots) and told that we're about a billion over the limit. The players are 18 and 10,000 from all around the world to compete, not against each other, the system. So, one year they all can pass, the next they all fail, this is to make sure the weak fall and the strong rise. So, the voice said

“Take your shot, stranger. You’ll only get one.”