Protonic Inversal Axe

The  is a weapon in the Fallout: New Vegas add-on Old World Blues.

Locations
Found in VR Simulation room within the X-13 research faculty. The VR room is behind a Hard locked door. It is lying on the ground to the right next to a skeleton and some Psycho. It can also be found on Test Subject 1 after you kill him in the cuckoo's nest.