Armory (GURPS) is one of Fallout GURPS skills. See: Fallout GURPS.
The ability to build and repair weapons and armor at the appropriate tech level. Roll to make, repair or find a problem with a weapon.”— Steve Jackson Games GURPS sources
With the abandonment of GURPS, Armory (GURPS) was recycled into Repair, while weapon maintenance folded into respective weapon categories.