I think you have to have a certain class ofa federal firearms liscense to have a fully automatic firearm in all 50 states,this liscense is not easy to get and I think you have to be 21 and be a owner of a gun business to obtain one,not being a skilled gunsmith and trying to make a gun fully automatic could be very stupid and dangerous,and you may end up with a gun that wont even fire or fires every time that you cycle the bolt to load a shell into the chamber,whether the trigger is pulled or not.I wouldn't advise this.Some of the gunsmiths on this site will post a reply on the laws if I'm wrong,but owning a full auto is illegal for most citizens I think.You would have no benefit of a full auto hunting any way it may be fun to waste ammo on tin cans,but you will find if you practice you can pull the trigger almost as fast as a auto.