These days "Made in America" really means "Assembled in America from Chinese parts". Not just for radios, but for almost all consumer goods.
The problem is, say for example an American company wanted to build an American CB radio from American parts. They would quickly run into a big problem.........they would discover that America doesn't make parts for anything much anymore, especially electronics ! Sure there's a few exceptions, but for the most part manufacturing has all moved to China and more and more to India. That's where parts come from these days.
MFJ is a great example of this. They would buy parts in Asia and assemble them in Mississippi into gear that was then sold as U.S. made. They really had no choice as most of the parts they needed were no longer made in the U.S. !
America doesn't make anything anymore, they just assemble parts from other places and call it "Made in U.S.A."