Actually, given Okawara's modernized design style, it looks more like something from the CE universe.
The idea is a pretty chuckleworthy homage to the
FA-78-1, though I hope it just stays as a 00V exclusive, because the actual execution design and art style are not my cup of tea.
In terms of the timeline, I wonder if this is a late season 2 style GNHW-like addition for the by then 0 Gundam ACD-type, or something that was worked on earlier, when the 0 Gundam was still in use by CB as a proper test unit.
As such, I wonder if it's inspired by, or served as the inspiration
for the Virtue Physical upgrade for Nadleeh, for example.
Edit:
D'OH!

The trademark blue and red of the ACD-type trickling through (which I only noticed just now) seems to confirm this was conjured up post ACD-type conversion.