Are There any requirements for a non-resident to purchase a gun in PA. Specifcally a muzzleloader?

I am a resident on N Y S but I do hunt PA.during the big game season and just last season did purchase a 45-70 H@R BUFFALO CLASSIC from D@R SPORTS CENTER over in naticoke pa.I had no problems at all I would think all is needed is a driver lic: and I think for black powder m/l you may or may not be required to fill out a 4473 forum,they may do a quick back ground check IF THE FORUM IS NEEDED ,which I know is done when purchasing a center fire rifle.otherwise I don't see any problems,but I read somewere new jersey may have there own regulations on black powder rifles.