Flames of Revolt
Zunt Megacorp frequently manufactures upgrades for other megacorps products. Ventex manufactures the Grasshopper wardroid, Sellus manufactures the Spartan wardroid. Zunt answered with its Hoplite line. The Hoplite series of replacement parts, upgrades, adapters and bolt-ons allows for the customization of both the Grasshopper and Spartan, or even to combine parts from either into one unit. Individual warbots with extensive Zunt upgrades and parts, sometimes wholly built of Zunt modules, are reffered to simply as Hoplites.
All three units are quite popular and common.