A trust is the only way to go in it you can protect all your firearms from any wierd stuff in the event of your demise, it can have everything firearms related in it mags whatever. 1ST never comingle your personel estate and your firearms make two seperate trusts!!!!!!! that way your guns are seperate and only those named in the trust will have them in order of their possesion first you ,then wife , kids etc.
another nice feature of a trust is you can put anyone you want in it for how ever long you like as long as they are able to have a NFA item, so example your brother comes up from where ever and you put him on the trust while he is there so while you are working he can shoot whatever he wants, then when he goes home remove him from the trust this way every one stays legal.get a laywer to write your trust.
going the personel way anyone else who uses it is doing so unlawfully.... good luck and enjoy your new toys the whole process is pretty easy.... the wait is hard...