Zanscare Empire Mobile Suit
ZMT-S35S Rig Ring

This huge mobile suit, rivaling a mobile armor in size, was developed by the Zanscare Empire as a complement to the psycommu fortress Angel Halo. The Rig Ring's oversized body contains a scaled-down version of Angel Halo's ring psycommu system, allowing it to amplify Angel Halo's psycho waves and relay their effects across Earth's surface. In lieu of arms, it's equipped with beam shot claws like those of V Gundam's infamous Contio.

Model number / ZMT-S35S

Source: SD Gundam: G Generation Zero

Zanscare Empire Mobile Suit
ZMT-S37S Zanspine

Model number / ZMT-S37S
Head height / 17 m
Base weight / 12 t

Standard armament /
  beam rifle x 1
  4 x beam strings x 2
  beam fan x 2
  beam shield x 2
  tinkle bit x 4

Source: SD Gundam: G Generation F