https://en.wikipedia.org/wiki/Number_of_guns_per_capita_by_c...
In Switzerland every male has a military type machine gun and two magazines at home and in my country, Austria, there are regions that rival Texas in terms of gun ownership.
Today I tend to believe that this might be a problem of city planning (and preventing ghettos). The US has cities that are much larger than the largest cities in the countries cited by me. But I might be wrong here.
Anyways, I do not doubt that police in Austria and Germany would act no differently than in the US if they had reason to expect that they could be shot every time they stopped a car. Thankfully this is not the case.