I took apart a sidelock 12 gauge today to clean it. When it came time to reassemble, I noticed one of the locks was uncocked (hammer forward). I attempted to recock it, however, even though it seemed to cock, the hammer was still falling forward. After a significant period of time trying to figure out what was going on, I discovered the hammer had split smoothly and perfectly between the main body and the notch where it makes contact with the sear. My question is this: can this be welded by someone who knows what they are doing and rehardened or will a new one need to be made?
