You can fire it.
But the maker can easily jam it.
Even their may have a back door system(self-destruct maybe?) in the device.
For example,American,you know.
Neither Russian nor Indian has exported Brahmos(or Ruby) to China.
But Brahmos is a typical Russian weapon.
It's not an advanced tech.
China figured that out easily.
Copy a design ideal of a weapon should not be considered "copy", I think.