The Bison Heavy Mech is intended primarily for defense. Its 70 ton weight is allocated mostly towards weapons and armor. It is equipped with one Ultra-10 autocannon, four large ER lasers, two medium ER lasers, and two machine guns.
There is ample ammunition stowage and very thick armor. The Bison is able to do all this in a compact 70 tons because the engine is designed more for recharging the lasers, versus rapid mobility while traversing a battlefield.
The pilot of this particular version has added a Streak SRM-2 battery "to zap those pesky Elementals".