Not an actual term used in the table top game nor the lore, but is used among the table top players of Heavy Gear; “core” Gears or “basic” Gears are the designs that are most common in the military forces on Terra Nova and are prominently featured in Dream Pod 9 books and supplements as well as in the product line.
Typically the term refers to one specific model in each of the four (4) military roles; Recon, Trooper or General Purpose, Strike and Heavy Support used by each of the Leagues or factions.
For Northern Factions Designs, these are: Trooper: Hunter, Recon: Cheetah, Strike: Jaguar, Support: Grizzly.
For Southern Factions Designs, these are: Trooper: Jager, Recon: Iguana, Strike: Black Mamba, Support: Spitting Cobra.
For Peace River Factions Designs (stretch goal), these are: Trooper: Warrior, Recon: Skirmisher, Strike: Warrior IV, Support: Crusader IV.
For New Coalition Factions Designs (stretch goal), these are: Trooper: Chasseur, Recon: Jerboa, Strike: Cuirassier, Support: Chevalier.