I also have a M14-4 with the "floating" hammer nose. The nose tip has broken off, so I ordered a nose from S&W. The one they sent me is quite a bit different than the old, now-broken nose, and will not fit on my hammer. The SKU for the new S&W part is 21239. My understanding is that this new nose has a spring behind it as well, whereas the old nose did not have a spring.
What part should I be asking S&W for? Anyone else have a proper "floating" hammer nose for my M14-4?
Thanks.