RE: AK47
IF it is a selective-fire weapon, semi-auto or full-auto, which most military AK's are, you'd have to register it as a machine gun and pay the Federal tax to register it even if they'd let you bring it back, WHICH I DOUBT!! If you got caught trying to smuggle it, you'd be in deep kim-chee, as they say!
The AK is only good for what it was designed for, laying down a base of fire during an infantry assault with no requirtement for any precision or accuracy. I see no use for one of the things, except for a fun gun for shooting beer cans!
The CARTRIDGE is in the .30/30 class, and softpoint loads can be used for deer hunting, BUT the AK would not be legal ANYWHERE for such use if it is a full-auto. In NY, semi-autos are limited to six rounds total in the chamber and magazine combined, so you couldn't use an AK 30-round magazine for hunting either.