Since all the IBO High grades have inner frames and Bandai doesn't show the images of the frames, I've decided to get a picture of just the frame on the hg Barbatos. :
Hi-Resolution Gundam Barbatos Unboxing and Inner Frame Review - IRON BLOODED ORPHANS - Part 1 - YouTube
Idk if its just the Vual but this HG is the first I've built with an almost 99% complete inner frame. : r/Gunpla
Figurise - HG IBO Gundam Asmodeus
Metal Inner Frame for MG Barbatos - Etsy
Delty (On a Camping Trip Till 2024) on Twitter: "Bandai: made a universal Gundam Inner Frame for MG Barbatos, with the idea of incorporating it with the rest of the 72 Gundams