PA as an OC state is confirmed. Refer to :
Commonwealth v. Hawkins, 692 A.2d 1068, n.4 (“In all parts of Pennsylvania, persons who are licensed may carry concealed firearms. 18 Pa.C.S. § 6108. Except in Philadelphia, firearms may be carried openly without a license. See Ortiz v. Commonwealth, 545 Pa. 279, 283, 681 A.2d 152, 155 (1996) (only in Philadelphia must a person obtain a license for carrying a firearm whether it is unconcealed or concealed; in other parts of the Commonwealth, unconcealed firearms do not require a license)”).