Hello; I dropped off a pistol for sale at a nearby FFL gunstore. It was reported to me that they found a mechanical problem with the gun and can not sell it as proposed wjhen I dropped it off. They told me that I have to fill out a new 4473 to get my OWN gun back ! I have already done one when I purchased it firsthand. I have written to the ATF website to see if that is true, as yet, no response. Does anyone have real knowledge/experience with this, not just a guess or opinion?