At least to start with it won't, because our flintlocks and percussion locks are not classified as firearms. They are classified as antique firearms and are exempt from the Gun Control Act of 1968. That is of course a federal classification and due to the preemprtion laws I don't believe it a state can change that classification. Very specifically the Gun Control Acto of 1968 classifies them as "Antique Firearms" and here's the part of the law that deals with that definition:
"Antique Firearm
26 U.S.C. § 5845(G)
For the purposes of the National Firearms Act, the term
“Antique Firearms” means any firearm not intended or redesigned for using rim fire or conventional center fire ignition with fixed ammunition and manufactured in or before 1898 (including any matchlock, flintlock, percussion cap or similar type of ignition system or replica thereof, whether actually manufactured before or after the year 1898) and also any firearm using fixed ammunition manufactured in or before 1898, for which ammunition is no longer manufactured in the United States and is not readily available in the ordinary channels of commercial trade."
The key word for us in that definition is "replica", which means any modern made version that still uses the same form and even more importantly "Antique Firearm".