Bob, your comment on making a fence out of gun parts reminded me of a matchlock barrel sent to me by Hans Meuller (sp?) known here as Dutch Gramps. He said he found it in Yeman, iirc, salvaged from a fence. It is iron, and the muzzle is a little damaged and bent from having been driven into the ground, but otherwise, quite useable.
It is hard to know how serious gun collectors from the late 19th C were, or whether or not, there even was such a thing?