>>718861445
Considering several Kojipro members, including Kojima, said the Battle Gear was cut due to being too OP, I think it was a victom of the PS360 ports.
Having to run on 7th gen meant they couldn't populate the world too much, meaning no convoys, and as such no worthy threats for the BG which apparently it was, not just the fastest vehicle in the game, but the railgun could one-shot tanks.