User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-5489419-20130107143646/@comment-5043481-20130107205950

Well, I think that if they exist (not sure about that) they would do the same thing as in unite, where every weapon that did not upgrade into G-rank would get a G version. Seemingly bowguns ignored this rule, and we got better versions of G-rank bowguns.