Since there are missions for “bolt action” and other specific weapon types, it would be good to clarify which weapons are part of these categories. It should say on their stat screen.
Some weapons aren’t particularly obvious - For example, the lever-action Winchester (which is not technically bolt action), counts as a bolt action… But I had to test it to find out.
I still think it would be good to have it clarified. The PTRD is clearly a bolt-action anti-tank rifle, but it didn’t seem to count for the mission when I checked.