I can't find my post from years ago, but the Model 11 Twin BeaconRay synchronized warning light, utilizing the VisiBar, was commonly (and erroneously) called the VisiBar...common because the end cap with the VisiBar label was staring you in the face every time you got in the vehicle. Stampeed is correct in that they were two different products offered by FedSig. I can recall many, many confused customers saying they wanted the VisiBar when the wanted the Mod 11. Eventually we replied, "You mean the one with the two 14s on the bar?"
"Yup, that's the one!" There was one customer that came in and wanted the bar only: "Could we special order it without the 14s?" We could have said we would do our best, but we told them there was no special order necessary and they were elated.