I recreated the machine that appears in Z-MSV in 1/144 scale using the HG Revive Guncannon.
The "MSA-005K Guncannon Detector" is a ground combat MS that appears in Z-MSV, which Karaba commissioned AE to produce. Although it's called a "Guncannon," it's actually a derivative of the Methuss. The Z-MSV version is red, while the machine that appears in the anime "Mobile Suit Gundam UC" is navy blue.
Gunpla has released a 1/100 scale in the RE/100 series, but no HG or 1/144 versions. So I made one myself. That said, I actually made a Metathus from the old kit a few years ago.

HG Guncannon Detector Wind | GPO144's Gunpla works