Hi Jim or whomever,
Can you entertain my ignorance for a little bit. I'm trying to google the peening thing and am not having much success. It talks about hitting with a hammer to improve metal surface, but I really don't have a hot clue where to look or what to look for. I'm assuming you mean on the first picture on the back of the bolt? Are you talking about the circle behind the screw or within that circle where someone tried to adjust the firing pin? Thank you for all the feedback so far.