While the BATFE used to require an individual to file a Form 5 and receive approval before sending the firearm to the gun smith, theBATFE several years ago said that such was no longer required. However, and an issue that most inadvertently overlook, the BATFEhas never said that a Form 5320.20 (BATFE Form 5320.20) does not have to be submitted and approved prior to sending the NFA firearm across state lines. While 5320.20’s aren’t, per the law, required for Suppressors and AOW’s, it is always a good idea to have an approved 5320.20 in case there are any issues with the police of the other state(s). Thus, whenever you are taking your NFA firearms across state lines or are sending them for repair across state lines, you should file and receive an approved 5320.20 before sending the firearm.
The 5320.20 can be faxed to 304-616-4501 or submitted via US Mail to Director, Bureau of Alcohol, Tobacco, Firearms and Explosives, NFA Branch, 244 Needy Road, Martinsburg, WV 25405.