45 ACP conversion cylinders for 1860 army

My admittedly amateur understanding is that doing a cartridge conversion makes the firearm a "modern firearm" while it has the cartridge cylinder installed, but that it reverts to being an "antique" firearm if the percussion cap cylinder is reinstalled.

Disclaimer: I am not a lawyer, and I did not stay at a Holiday Inn Express last night.
 
Perfectly fine to manufacture your own firearm for your own use. Of course, if you can't legally own one you can't legally make one either.

Mike
 
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