I see. But what about simply the basic parts other than the receiver, or working on a flare gun's parts?
Flare guns aren't guns . The canons etc aren't guns. Hence why you can go to Walmart and buy a flare gun or order mini canons on the net.
Heck I made a few lol .
The flare guns fall under nfa when you buy the inserts to shoot 12g rounds/9mm/45 ect etc . Those are dd's. Also after 37mm its a grenade launcher etc.
You can build a cannon as big as you want . As long as it's a muzzle loader style no breached loaded. In fuzzy in rifling since I never bothered lol .
I made a .45 and .50 cal cannon .
Take Oxygen tank (welding size) cut end off , drill hole for fuse. Add powder . Stick bowling ball down the tube.
What do you got in mind?
Flare guns etc I don't know tons about , could point you to a few sites. but I know more about canons etc.
I run the machine shop at my work. And got a small shop of my own .
Depending what you want made I can look up the rules etc. I'm not a company on the side. Just when you work in metal you buy your own tools and you make your own crap . I make stuff for my self and friends like tools etc for beer so I don't fall under tax law stuff it's just a shop me and my dad been buying tools for our own use and help friends out.
I just made back hoe teeth for a buddy.
Heck I can't sell a muzzle brake I made with out getting a FFl or so I been told.
Machine questions fire away.
There a bunch of builders here.
Truth be told a lot of black powder style parts are cheaper to buy from a supply place then pay a shop todo a one off. Most shops I know do 50$ setup fee, x amount per hour and cost of metal some up charge on supply's some you pay there cost just labor etc.