> Muzzleloading cannons manufactured in or before 1898 (and replicas thereof) that are not capable of firing fixed ammunition are considered antiques and not su

> Muzzleloading cannons manufactured in or before 1898 (and replicas thereof) that are not capable of firing fixed ammunition are considered antiques and not subject to the provisions of either the Gun Control Act (GCA) or National Firearms Act (NFA). The answer at your link doesn't seem to apply here.