The raider class is a test-bed, providing experience in ship and weapon building to a new company. the only example is the SS Raider.
Originally designed as an attack craft, it was clear partway through the building phase that Origin Industries didn't really have the proper experience to build a warship. Changing plans at the last minute, the ship was fitted with internal sensors and test gear required to study the effects of different systems on the ship's frame, allowing for this knowledge to be used in later designs by Origin industries. Being a tested, this ship is not intended to see actual service, ever.