Ok, so I'm about to dive into the EBR assembler fraternity.

What a better way to start than to ask a dumb question. With all the laws/regulations and rediculous red tape technicalities, I want to check in here.
I'm looking at getting one of Spikes stripped lowers thats all over the place for $90. Only catch is, they're marked safe/semi/auto. Is this a problem for someone just looking to build a semi-auto? I assume all the parts work just as well, but I wasn't sure if JohnnyLaw would have a problem with a rifle with "auto" markings for average citizen-me.?