First thing is please excuse my ignorance so that's why i'm here to ask the question.
We all know of people that buy an 80% AR lower and do the machine work themselves to build it into a rifle. What happens when they use a short barrel and an approved "Sig" style brace and say they are converting a 80% lower into a AR pistol ?? Aren't they actually building an SBR without a Tax Stamp ??
Thanks
Rob