The triggers came in the accessory kits later in the Blade System's life, so you do see more RB's outfitted in them. Slit lens was an accessory only too, so the model name sort of depended on the lens even if they weren't bought that way.
Naming conventions sort of evolved once we got to the M Frame, where we have Sweep, Heater, Strike and those are tagged on to the frame name. Same for Radar Pitch, Radar Path. I suppose to be technical you could call them the Blade System with RazorBlade lens or Blade System with Slit. Either way the stems ended up on both, and the re-release of the Blade will have triggers