Mississippi enticed Olin (Winchester) to place its new ammunition factory in Oxford and the Mississippi Department of Economic Development has courted Baretta in a formal letter to consider Mississippi as a new location for production. Colt, Ruger, and Mossberg would be welcome and thrive in Mississippi.
At this point, it's probably better for people in pro-RKBA states to take a look around and note any likely facilities that these companies could use. We can all pull for our home states to be the next home of these corporations, but as a Texas resident I'd be just as pleased to see Colt, Mossberg, Marlin or Remington in Oklahoma, Louisiana, Mississippi, etc. - whatever works best to get them out of Connecticut and New York ASAP.
If anyone knows of a light industrial area that is under-utilized right now, let these companies know about it.