JS44, no they are not really 2 piece barrels. I think what Cabela's is trying to say is that they are replicas of the originals. On most sporting guns, you find a drum with a nipple protruding from it screwed into the side of the barrel, and the breachplug with tang attached is screwed into the end. Many military guns, on the other hand, were built with a one piece forged breech which included the tang, and the bolster, which the nipple was screwed into. The barrel was then attached to this rather long piece. This was considered a great technological improvement over the drum setup, which was really nothing more than a cheap way of converting flinters to percussion.