Luger and Mauser pistols.
Like any other product, guns are manufactured to be sold. Buyers can be private citizens, business entities, or governments.
hand guns , long guns, Air guns , Rifle these are used as a firearms .
a factory
Long guns and hand guns.
Raw materials, workers, bueprints.
Every corner of the globe
There is no one single location.
Long guns and hand guns
The Model 101 .22 was manufactured at least until 1968. You could probably find out for sure by going to the Savage Arms website.
Entire books have been written on the question you have just asked. Short answer is raw materials, blueprints, machines and/or hand work, final product.
HD Folsom or Crescent.