North American Arms, Cobra, and LAR are based in Utah, among dozens of bullet and precision rifle companies. (Robinson Armament, Vector Arms, and Barnes Bullets being some of the notables that don't make handguns.)
Browning is another notable addition, but, to the best of my knowledge, only the Buckmark frame, 1911-22 frame and slide, and some of their bows are made in Utah. Everything else is imported, or made elsewhere in the United States.
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."