I realized 3D printing is a huge business in America. They used it on alot of military stuff included hypersonic missiles (I've read that from an article.) And plus it is done with automation.Depends on how capable it is. Maybe it is more appropriate for use against lower-end targets rather than high-end threats. We really don't know which environments it would be capable of operating in.
As far as the low pricing goes, I mean it is possible. who knows.