Yeah, they had a decent selection of firearms, from what I could see. Large quantity, certainly, although they had multiples of the same gun on display. That was probably one of the more crowded areas, and I was pretty sick of the crowd by the time I got to that area, so I honestly didn't spend much time there.
Most of the long guns were geared towards hunting, but there were 5-6 AR's and some HD type shotguns there. Pistols - saw S&W's, Rugers, Colts, Kimbers, SIG's, H&K's, even a lonely desert eagle.
They also had what they called the "firearms" library, which was set up museum-style, although most of what was there appeared to just be high-dollar stuff for sale (fancy over-under SG's with gold inlay, etc) and overpriced C&R stuff. The overpriced part seemed pretty consistent in regards to the firearms, from what I saw, although it was hard to get close enough to read the small tags. Not too much more than what your typical small gunshop may list, perhaps, but you probably can't haggle there.
They also had two ~25ft two-tiered, double sided racks that were full with used long guns. These were out on the floor where you could handle them, though they all had trigger locks, of course.
Probably 1.5-1.75 hours from the philly airport, depending how fast you like to drive.
Rocko