The Ontos heavy tank saw extensive action during the Succession Wars, when its twin missile launchers and large array of lasers made it a mainstay of House troops throughout the Inner Sphere. However, many commanders considered the Ontos an inferior tank because a lack of sufficient heat sinks limited its battlefield effectiveness. The 3050s saw an update of the design that used pulse lasers and other weapons, and that design fought well throughout the FedCom Civil War, the Jihad, and the St. Ives War. When Nanking fell to the Tikonov Free Republic, the Ridzik brothers ordered a modification of the design to work with their organizational structural. The result has become one of the primary front-line tanks of the Tikonov Republican Guards.

         Kallon Industries' Ontos features a Nissan 285 extra-light fusion engine in place of the older designs' bulky power plants. The use of a compact fusion engine eliminated the need for power amplifiers seen in the Succession Wars-era design and freed up tonnage for weapons and armor improvement.
         An array of eight Intek medium lasers mounted in the turret use a special targeting computer to give the design impressive accuracy against enemies that hope to close the range. Three Republican Far-Shot Multi-Missile Launchers, slaved to Artemis fire-control systems, round out the Ontos's armament, and make it a dangerous opponent at any range. The final addition to the tank was a Kallon Sure-Shot C3 Slave Unit that allows the Ontos to share targeting information with a C3 network.
         Missile ammunition is stored immediately behind the turret in an armored area that features CASE technology to protect the tank in the event of an ammunition explosion. Additionally, the tank features ten tons of Duralex Lite ferro-fibrous armor, which provides the upgraded Ontos with far more armor protection than the original design, and even more than the Clan Invasion-era tank.

         The Ontos is the primary front-line tank of the Tikonov Republican Guards. A threat at long to short ranges, mounting multiple weapons so no single strike can disable it, and capable of sharing targeting data with other units, the Ontos is without equal in Tikonov space. The only major weakness of the design is that heavy focused fire from an enemy can quickly break through its armor and immobilize the unit. A low maximum speed means that an Ontos cannot run from a losing battle, so Tikonov rarely fields them without support.