I have an offer from German friends to gift me magazines for Glock 21 and Steyr M9. They wonder, for one, if they can even buy those freely without having licence or firearms of their own. For another, they are curious if mailing a parcel would cause some post office snoop to freak out upon seeing the mags on xray screen. Third, they wonder if I can accept the gifts. Anyone with good understanding of how this works?