General Kerensky himself designed the specifications for the Devastator to make up for perceived flaws in the prototype Titan. However, when Stefan Amaris seized the reigns of the Terran Hegemony, production of the Devastator was stalled until the invasion of Terra, when a mere six prototypes were delivered to the Star League Defense Force. After its deployment in the battle for Terra, the Devastator remained lost to the Inner Sphere for centuries, until troops from the Federated Suns chanced upon the blueprints in a Star League base on the world of Hoff in 3023. A downgraded version of the 'Mech was prototyped in 3033 by the NAIS, using technology available at the time. It was not until 3044 that a Devastator appeared that was constructed using the intended technologies (DVS-2); this version was finally put in production by 3048.
The Devastator is powered by a Vlar 300 XL Engine giving it a top speed of 54 km/h. The 'Mech is protected by eighteen and a half tons of Durallex Heavy armor and has fourteen double heat sinks to dissipate waste heat. [Source: sarna]
You can download the papercraft model here: Classic BattleTech - Devastator Free Mech Paper Model Download