Military Repairs in the field?

[Lugerdoc]

Judging from the amour's spare parts kits that one sees occassionally, I suspect that these fellows were primarily parts changers. One also sees a luger come back with "capture papers" with a mismatched top to a bottom from another luger, which they probably made one shooting luger out of two defective ones. Barrel changes and major problems were probably not attempted in the field. TH