The M-90 Mako II is a System's Alliance Infantry Fighting Vehicle designed for System Alliances Frigates. Much like the M35 Mako, it is designed for rapid deployment and frontline attacks much like its predecessor. While it shares its similar cramped interior design, it is designed to be carried in frigate class ships for quick deployments. It is named the M-90 "Mako II" is because it an improved variant model of the Mako after different model updates after the Reaper War to make it stronger than its predecessor.
Another piece of concept art I've made for my story of Mass Effect: Galactic Warfare, mixing it up with the Mako and the Nomad from Andromeda.