I will disarm someone on a case by case basis, normally I will ask where the firearm is located and if it is on their person I will just have them keep their hands on the wheel. If the gun is located in the vehicle such as a glove box or center console I will ask them to exit the vehicle or to come sit in my front seat. Honestly though if I feel the slightest bit uncomfortable I will take possession of the firearm until the stop is complete, then I will have them pop their trunk and place the firearm in the trunk and close it completely taking it out of play. I understand that many will feel that this is the wrong action to take but I would rather error on the side of caution.
What would you do if they refuse to open their trunk (WELL within their rights)?