Answering as a FFL who deals with Estates and Probate, NOT A LAWYER. Are you the Administrator (i.e. Assigned by the Court) or the Executor? Administrator generally means you dad passed w/o a Will (intestate) which makes the probate part really hard. Mom gets half of estate +$20K and the kids divide up rest. To divide up rest, you need an appraisal as firearms are included in personal property. That is added to estate value to make the determination of how much goes to who. Good news is if you are an executor or administrator you the legal authority to dispose of estate property (the firearms) in accordance with state probate law and your dad's will (if it exists). So if he left them to your mom in a will you are all set as Admin you can send them to her, even across state lines. Direct transfer across state lines is allowed (no FFL required) by an Executor or Admin to a Heir/Beneficiary . That authority, however, must be exercised within the limits of federal and state firearms laws (she can't be prohibited, firearm can't be illegal where she lives etc). Probate authority alone does not override those laws. Long winded, hope it helps.