The book says this,
"Lena equipped Wagner with a meter-long metal rod, which can be shot out of one arm. The rod is used to tinker inside machines without having to take them apart, but can also be used as a weapon."
I'm wondering, does this rod extend out the end or side of the arm, does it have articulation? How does Wagner use a rod to mess with internal mechanics? Does he use it to get around outer parts or does he drill through the outer shells? Any thoughts? Sorry if I've missed something.