[Neus]

Raid Cannon replaces instances of your unarmed weapon with the Raid Cannon weapon, and the way skills that require Fists function in a special way; they will be treated as usable if you have a Fist weapon equip or no weapon equipped (or satisfy MMA's conditions). When you use these skills, it will use your unarmed weapon; in this case, Raid Cannon replaces it. That is not a bug, just a nuance of how the trait works.

However, the Rampaging effect was not applying on hit; this has been corrected.