Well, can you imagine character with completely crafted leather clothes, leather backpack and repeater? It is awesome. But with no scope would be very short time live for this character... :(
And also some picture, that it is not something, whyt would be possible.
To be honest much crafted weapons, such a pipe rifle or something, would be much more fun, that whole army set. Of course it would mean some workbench and tools, but if I remeber correctly, devs plan this already...