I watched this episode segment again, and need to correct some things. Rick offered the guy 12K first, but then upped it to 15 grand, and the guy didn't say that he was full of stuff; he called him a dumbass for offering such a measly sum. Sean the 'expert' said that the barrel was originally a muzzleloader that had been modified, so the Strong breech mechanism could be installed on it. I got a decent look at the shell they fired, and it looked bigger than a 3-bore.