^Long ago I had a friend who was a gunsmith and he had a single shot .50. It was before you could buy them or before they were very common at least. I can't remember if he made it or bought it and I can't remember exactly what it looked like, but I just remember it looked very strange, like a giant sporting gun. I'm pretty sure it was somebody's custom job. He wanted to get on two different mountains with walkie talkies and shoot targets but we never got around to it.