Sadly not legally. Although if you buy one out of state you can disassemble it and have it for SHTF purposes or if you travel out of state often.
I'm gonna stop you right there, you just said an AR-15 is a high-powered rifle. It is obvious you don't know anything about guns and I shall ignore anything you say from this point on.
well there are police officers online looking as well for illegal stuff for sale.
anyone ever seen "Wild Justice"...
they went on Craigslist and found someone selling illegal wildlife and acted as a buyer and arrested the dude on the spot