Military Repairs in the field?

[HardBaller]

What did the Imperial era forces to to repair Lugers in the field? Was there a standard unit type for this similar to US forces? I understand that officers could easily afford to send back to DMW or Erfurt, but what about the various UBoaters, Stormtruppen, etc. who eventually became authorized to carry the Luger?

Thanks for your help.

Tim
Houston, TX