27 CFR § 479.131 - Records.
For the purposes of this part, each manufacturer, importer, and dealer in firearms shall keep and maintain such records regarding the manufacture, importation, acquisition (whether by making, transfer, or otherwise), receipt, and disposition of firearms as are prescribed, and in the manner and place required, by part 478 of this chapter. In addition, each manufacturer, importer, and dealer shall maintain, in chronological order, at his place of business a separate record consisting of the documents required by this part showing the registration of any firearm to him. If firearms owned or possessed by a manufacturer, importer, or dealer are stored or kept on premises other than the place of business shown on his special (occupational) tax stamp, the record establishing registration shall show where such firearms are stored or kept. The records required by this part shall be readily accessible for inspection at all reasonable times by ATF officers.