Not to be argumentative, just clear.
So long as the receiving party holds an FFL, no FFL is required at the sellers end.
UPS, Fed-Ex, etc. may claim so, but it’s not true.
Long guns may be shipped via USPS, if you can find a postal clerk that follows the actual regulations.
Well, All I an saying is that our friend should contact an FFL holder in Ca, and that anyone selling across state line should as well.
Our gun laws are clear as mud.
Oh, Also, The only folks that can sell across international borders without approval from the State Dept and ATF or liscensing are Eric Holder and the Justice Dept /s