Howdy,

Federal Firearms Co.
5035 Thoms Run Rd
Oakdale, PA 15071
Phone: (412) 221-0300

I picked up both a Beretta 92FS(M9 Army edition) and a custom made AR from this shop in the past month. They were great. It's small and kind of tucked away but a nice place to do business and their prices were very good.

If you are looking for a new AR they build them from good parts for much less than you'd pay for a pre-built one of similar construction.