My $.02, worth the price paid:
There are a bunch of new rules that affect all states when it comes to 80%'ers. I would avoid them. BATFE has been collecting sales records for anyone selling them and then knocking on doors. They're still legal for now (there's an injunction in place that's stopped a 'ban' from being put into effect), but I expect that if the courts side with Brandon that anyone who's bought them in the meantime will meet some unpleasantness in the future. Some folks are OK with that, and I applaud them, but it's not the right choice for everyone.