I have done some business with them in the past,(didn't ever have a problem with them) & they always have a booth at the larger gun shows.
These guys have inexpensive uppers too, but you will need to call them to see when they will be building the .300 bo uppers next.
I've bought parts and uppers from them several times.Never had any problems with their stuff.
They always have a big set-up at the Dallas-Ft.Worth area gun shows,and have plenty of finished uppers with them.
You might call them,and see if they do any shows in Oklahoma,or maybe take a short trip down here to a gun show that they're attending.