I don't think California has a legal minimum handgun barrel length, although they do have a number of other onerous requirements to approve handguns for sale. LA does not allow sale of guns below a minimum overall length and height, though.
http://gunwiki.net/Gunwiki/LegalCalifornia
http://gunwiki.net/Gunwiki/LegalCaliforniaCityLosAngeles
http://gunwiki.net/Gunwiki/LegalCalifornia
http://gunwiki.net/Gunwiki/LegalCaliforniaCityLosAngeles



















































