I'm assuming most here are aware of the Silencerco Maxim50. https://silencerco.com/maxim50/ Basically a muzzleloader with a permanently attached "silencer", except because it's attached to a muzzloader, it's not a silencer according to the NFA. I like the concept, but don't like the gun it's attached to for multiple reasons. I'm thinking up a custom muzzleloader build in my head and was wondering about doing the same thing but building it myself. Obviously, the moderator (since it's not a silencer as per the NFA, I'll use Silencerco's term for the thing that would be at the end of my barrel) would have to be permanently attached to my muzzleloader, but I'm not very fluent in silencer legalities and when does a piece of metal tubing become a Federal crime... So, any pointers? What parts of a silencer are regulated and at what point in the process of building one would one need to have a NFA registration? I'm looking to do this entirely without creating a silencer as per the NFA definition, so any ideas on method and order of manufacturing?