That picture was from the original Kickstarter announcement, and some of those sabers contain parts that either exist but not in ASP form yet (I see a Guardian emitter and a Destiny body), or never materialized (like the emitter on the hilt to the left of the one you are asking about).
It appears to have a Gladius body and switch section (with the lower part of the switch being gold/brass), as well as the bottom part of the Gladius emitter, but I haven't got a clue as to what they screwed on top of that.
My guess is that this picture was just them assembling the parts of their existing hilts that did share the same threading into some hilts just to demonstrate the concept.