MagnaGuard Manufacturing

MagnaGuard Manufacturing was a combat droid manufacturer that Grevious approached to create the IG-100 series. It also produced most of the MagnaGuards various weapon systems.

Behind the Scenes
The Republic Commando website names "MagnaGuard Manufacturing" as the creator of the IG-100 series droids although more recent information says Holowan Mechanicals as the droids progenitors.