Beretta92FS
NES Member
As to no jurisdiction out of state ....
To be safe the ownership of the guns must be transferred. A MA court can issue an order to surrender all guns including those stored out of state that you have direct or constructive possession of, and one can be held in contempt for not doing so. The safe harbor is to have documentable proof the guns have been transferred - which creates repatriation problems when it is time to get them back (have to go through an FFL).
It would be an odd situation though. If a person take firearms out of state in order to comply with the law, and the MA court forces that person to bring them back, thereby forcing him to break the law.