Pursuant to Pennsylvania Codified Statutes 18 Pa.C.S. 6120, The East Norriton Ordinance 139-2.3(G) is Preempted.
Furthermore, it is a General Restriction against The Ordinance Power otherwise Delegated to Local Governmental Units throughout Pennsylvania that They may not Regulate Firearms under 18 Pa.C.S. 2962(g).
So, Yes..., The Answer to Your Question is that East Norriton Ordinance 139-2.3(G) is Null and Void.