Take a look at the ATF Form 6 NIA. Questions 12 and 13 ask the following.............
My humble opinion, which is of limited worth, is that the ATF is offering temporary importation of firearms for specific purposes and that does not appear to include concealed carry. I am presuming that the application offers importation for hunting purposes, collection purposes and sporting purposes but I am greatly concerned that a decent, law abiding Canadian citizen carrying a concealed weapon under the auspices of a Form 6NIA could find themselves in very serious legal consequences.12. Do you possess a valid hunting license or permit lawfully issued by a State of the United States? (See instructions 17 - 20)
If you answered Yes, attach a copy of the license or permit to the application and skip to question 14.
If you answered No, go to question 13
13. Do you possess an invitation and/or registration to attend an upcoming competitive target shooting event or sports or hunting trade show sponsored by a national, State or local organization devoted to the collection, competitive use or other sporting use of firearms? (See instructions 17 - 20)
If you answered Yes, attach a copy of any invitation and/or registration.
If you answered No, you likely are not in compliance with 18 USC 922(g)(5)(B) and therefore likely are prohibited from obtaining an approved ATF F 6NIA (5330.3D) temporary import permit. (call 304-616-4550 for additional information)
BATFE does not have a well established sense of humor and I would suspect that they expect firearms temporarily imported to be used for very limited and stated purposes. There is doubt in my mind that they would allow a handgun temporarily imported for a stated purpose to be used for a separate and unstated purpose. I, respectfully, suggest that the question be posed, completely and fully, to BATFE for their interpretation and any correspondence with or from them be saved for future reference.