by solidgun on Wed May 02, 2012 7:53 pm
As long as you conform with NFA and you do not intend to resell it, it does not violate any regulations.
So you would machine, engrave (make, model, serial number), anodize, etc.
Sounds like a lot of work, but if you have all the tools already and you can ensure that the metal quality is reliable, I think this might be a fun project.
A fool takes no pleasure in understanding, but only in expressing personal opinion. —PROVERBS 18:2