[AnnaLaura]

Where would other records be? Wouldn't there be some history on each gun or gun lot--manufacturer, date of purchase, circulation, etc.?

[Feckless]

Not at unit level. These weapons were fired prior to deployment and annually (at a minimum) prior to that. Neglect at user level (which can happen only with NCO/Officer neglect) most likely caused malfunctions.

[HoustonCurmudgeon]

Where would other records be? Wouldn't there be some history on each gun or gun lot--manufacturer, date of purchase, circulation, etc.?

.... and that would tell you what about this matter?