[2nd Rangers]

I know the US did consider the Luger but did not feel the 9mm was a large enough round for military use. I believe a batch of Lugers were produced in .45ACP and tested by the Army.

For the Airborne question, I would say musette bag. Musette bag is another term for the 1936 Haversack it was issued along with the 1936 suspenders used by the Airborne and officers. The US didn't issue a bread bag along the lines of the German equivalent, and riggers modification is more a generic term for any of the many little modifications that were made to Airborne equipment. I'm not sure there really is a correct answer for this one as there was a lot of variation from soldier to soldier as to how and where they carried their equipment.