Do firearms use Dex?

Could you clarify what you mean by "Dex" in the context of firearms? Is it referring to a specific technology, material, or some other aspect of firearms usage? If you're asking if firearms utilize some form of advanced technology or material named Dex, I'm not aware of any mainstream firearms that specifically incorporate a component called Dex. Firearms are typically made up of metals like steel and aluminum, along with various plastics and polymers for grips and other components. They may utilize advanced manufacturing techniques or materials, but without further context, it's difficult to say whether or not they use something specifically called Dex. Can you provide more information or context to help clarify your question?