i've been thinking about making some parts for a few projects myself and had a couple of questions for you guys. i was going to start with the rear tang, because it is fairly straight forward and not too critical of a part. my question is what would a good steel to use for it? i'm not sure how mild steel would hold up to constant battering of recoil, so i was thinking of 4140 pre-hardened. IIRC it has a rockwell of 30-35, but can still be machined fairly easily and i won't have to send it out to be hardened. thanks for any input you can give.