To combat the Venrock heavy tanks, the Vulpesants developed and deployed a series of Tank Killers. These are high-survivability vehicles, designed to engage enemy tanks at range, receive enemy fire and come out on top. Though they never did battle with the newer Venrock armor near the end of the war, the Arkau Tank Killers could defeat any enemy vehicles they encountered.
Unlike most tanks, the Arkauís turret only traversed sixty degrees total side-to-side, as the entire vehicle would rotate to face its target. Every anticipated point of weakness was protected with heavy layers of sacrificial armor, and the base hull of the vehicle was incredibly tough in of itself. Aside from the engineer, the entire crew rode within the tanks turret, a driver, gunner, loader, and tank commander, with the engineer riding in the aft section of the vehicles body. This increased survivability while combating enemy units even more so. To protect against infantry and lighter vehicles, the Arkau was equipped with a pair of heavy machine gun turrets, the rearmost being controlled by the engineer. Being an advanced unit, the tank killer was powered by an enormous turbine engine, enabling the tank to keep up with its lighter and more speedier counterparts. She was often paired with two or more scout tanks, who would locate and entice enemy units into firing range, where they would then be dealt a supersonic duplex round to their main turret or chassis.
The duplex rounds fired by the Arkau could penetrate even the armored turrets of the Maganacor MK5 tanks, which made the Arkau an incredibly valuable asset to the Vulpesant military. These rounds were specifically designed for the main gun of this unique vehicle, and achieved ranges, accuracies and velocities unheard of in such a small caliber. Due to their expensive construction and skilled crews, these vehicles were rather few and far between, and were actively hunted by their Venrock opponents. A few were captured after being damaged in combat, but their crews followed specific instructions, destroying the breech of the main gun, and blowing the ammunition magazines up as they abandoned their vehicles, leaving little more than a burning hulk for the Venrock engineers to poke and prod.