[.45 Long Colt]

I was under the impression you can build one for yourself, but you can’t sell it without the FFL. I have never looked into it, so I’m not surprised.

[allblues]

You are correct. One may build a firearm for personal use as long as you are not a prohibited person, and the firearm is legal both at the Federal and state level. You may not sell it, and a serial # is recommended but not required.