There were a couple of models.
Peavey signed up Brian Bromberg for a signature bass and allowed him to go to town. Called the B-Quad, they came with Modulus CF necks.
This is my one .
Few years later, 1998, they revisited CF necks but this time it was a under-sized maple neck with a carbon wrap. There was the 4 string model, G-Bass, 5 string G-V.
Mistaken identity/crossed wires/wishful thinking have led to an urban myth the G-Bass/G-V also had Modulus necks, total BS 🤣 My old pal recalled the raw necks were shipped out to a gun factory, Bell & Carlson, for wrapping.
Never found a G-V but did snag a G-Bass.