OO-4

The Omniphasa Ordnance 4 (1931) with regular and winter camouflage.

When the time came that the OO-2 and OO-3 became inferior to other models around the world, it was certain that a heavy redesign was needed.
With a completely different hull and turret than it's predecessors, the OO-4 retained the suspension it shared with the others, but gained armor thickness and firepower instead.
Here are a few notable changes:
    - Added rear fuel tank for longer traveling distance
    - Gained armored frontal viewport that allows observation to the front and sides of the vehicle
    - Average armor thickness went from 10-20 mm's to 15-30 mm's
    - Well-sloped octagonal turret
    - Vahrahan Yards 45 mm Mashad Mod.D with 39 rounds
    - Extra utility boxes and emplacements for spare parts of the tracks and suspension wheels