you can still build a ar. you could say the build date was last year if you want to reg. but i dont advise that. or use a ny safer grip to avoid legal issues.
buy a 80% lower mill it out or drill press or dremel. even could use hand tools. and they ship uncompleted lowers to your house. no ffl needed. just like any other part of a semi ar.
buy upper at a gun store or build your own, buy lower parts kit, buffer tube kit, and a mag. bang you have a ar. so easy a lil kid could do it.
if you have a 3d printer or access to one. print your own lower. theres enough designs out there for free.
also theres some shops that sell %100 lowers but they are marked post safe act in the vin #s. so if you assemble it after 1/15/13 its illegal if you use a traditional pistol grip. but you could use ny safer grips that are legal.
all the parts for a ar15 are still legal. but if you have them assembled then its a another story. all parts can be shipped to your house too. unless you get one complete then its considered a gun and requires a ffl to ship.
ak parts kits and alot of other guns are easy to find too and %100 legal to ship to your home without a ffl. if the lower or the gun is complete they cant ship to your home.