Gunsmith's answers:

Broken stocks are #1. Probably by about 6 to 7 times. Falls from loosing their footing as well as horse wrecks and rolling 4 wheelers all combine to make this the #1 thing I am asked to do repairs to, during every hunting season.

Broken extractors are #2.
Broken trigger parts or pins are #3

A "weapon's system failures" would be broken scopes but I don't classify them as gun failures. But seeing that come into my shop is about as common as #2 and #3 combined.

Others I have seen several times but not enough to give them a "rank" are broken firing pins, linkages and bulged or blown barrels.

Last edited by szihn; 11/25/22.