The only difference between the Hunter One-Triggers is that there is no selector switch for the other. The are built internally the same.
The right barrel is fired first and then the left barrel (unless ordered different).
Jerald, there are only 3 springs for a Hunter One-Trigger, trigger spring, spur lever spring and the weight spring, which is a coil spring.
I have never seen a non-selcetive Hunter One-Trigger so I cannot say for sure why it is there, but if the second barrel does not work, that would answer your question.
It could be made, just have to find the right thickness spring steel and get a dimension from the broken one. Feeler stock would work for it.
