Is an antique black powder gun a firearm?

First remember that your state may have more restrictive regulations than the federal government. Check your state laws. They are usually listed under Revised Statutes on your states website. On the federal side, the BATFE goes by the provisions and requirements of the Gun Control Act of 1968 for the most part. On their website the number one most frequently asked question is about Black Powder Guns, and whether or not they are firearms. It stacks up like this: Any gun that uses a match lock, flint lock, percussion cap, or similar ignition system, that was made in 1898 or earlier, or is a reproduction of one of those guns, is considered an antique and not a firearm. For all of the particulars and exceptions go to the Bureau of Alcohol, Tobacco, Firearms, and Explosives website and read ALL the fine print.