More of an exosuit/exoskeleton, the Sabertooth was used by the former Neo-Soviet Union and rarely by the Eurasia Federation. It is armed with two 7.62x39mm machine guns mounted on the sides of the suit. It was used extensively due to its low production costs, but was quickly phased out with the advancement of Mobile Core technology.
The side view.
The rear view.
The back opens up to allow the pilot into the suit.