I am trying to figure out the proper way to ship a handgun to a buyer on GunBroker

I am unlicensed (no FFL) and I am. Not clear on how to legally ship a handgun across the country. In my account, I have the buyer’s preferred FFL dealer information. Do I just pack up the pistol and mail it to the FFL dealer? I am so confused. I emailed GunBroker and they just quote their website. Thanks. via /r/CCW https://ift.tt/3jKMFsj