It's been in use for many years in the gun world. Simply a short way to say a piece underwent arsenal re-build/re-work/re-manufacture/re-condition. Kinda like a taking the phrase "re-conditioned at an arsenal" and condensing it. This differentiates it from a piece that was re-finished in someones garage or shop. Saves keystrokes.Not to be picky but there is no such word as rearsenaled. That's like saying a repainted car has been regaraged. Who ever came up with the term did not understand firearms. With so many new members reading our posts I'd rather not see bad information passed on.