Since you must register a firearm to get a CCW in DC I was told the used Firearm addendum MUST be filled out no matter what even if you purchased the weapon new. The instructions clearly say only needed if gun was purchased used or not purchased from a FFL. According to the reps in the office EVERY GUN not currently in the gun store is used as far as they are concerned. If you do not know the date of purchase, location, phone number, name of shop and address they WILL turn you away. So make sure you register a weapon you know all that info about.