It is illegal. The ATF has very strict requirements about building receivers. If you home build a gun, you have to have an ATF builder’s FFL, and register the gun.
My local gunsmith and I were talking about building a 1911 variant for fun, and he looked into the regs.
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.
“It is illegal. The ATF has very strict requirements about building receivers. If you home build a gun, you have to have an ATF builders FFL, and register the gun.
My local gunsmith and I were talking about building a 1911 variant for fun, and he looked into the regs.”
IF you have any intention of selling it.