Threefold answer. Part one is labour. There would be a demand for craftsmen, inspectors and the handpolishing that a robot cannot perform. Part two is the steel required. The best steel is not American. Asian steel is superior and it would need to be imported and run through the factory in the USA. S/H is expensive. Part three is the EPA garbage. Nickel firearms are a pretty sight. Blue and nickel require EPA storage, monitoring and disposal. Stainless firearms can be made by robots, polished by robots, assembled and testfired by robots and even dropped in boxes and stacked by robots. Labour, steel and the EPA are the causes.