What is Germany's best gun made?

Answer 1

"Best" is subjective. One could just as easily say the Mauser rifle - which had more of a historic impact than any firearm manufactured today in Germany - but it's an obsolete weapon which is vastly outperformed by modern firearms. Germany has a long standing tradition of making quality firearms, but you need to narrow down your criteria of what you consider "best" before a feasible answer can be given to this question.