If they order a bunch of trigger return springs and some more small parts, they can rock on for 20 more years with little money.
Recommended spare parts
PS: OK, but I don't want to be stingy. If they think they need new guns, I would not speak against it. (Since I pay my taxes in another federal state of Germany, it's not my business anyway.)
BTW: The HK factory is in Baden-Württemberg. And Walther, too.