I "think" this is the link to my drop box to some photos of the bolt. I cant see any FN or Husqvara markings except British Proof markings and the chap selling it is not being much help...which is another reason why Im a bit suspect

If someone could tell me the photo link is working that would help

https://www.dropbox.com/sh/0nej5c7rfr2ph3q/AAB6UuRW34-qwkUhXoAE4udTa?dl=0