Ok, I completely stripped that sucker down and closely inspected each part.
The TRIGGER, and the sear are not G.I. parts!
The forward area of the trigger is spring loaded so it slides back and forth, so really the trigger IS the disconnector. There is also a trigger return spring which is not a GI part.
The trigger engagement area of the sear is designed so the trigger won't re-engage the sear unless it's released after each shot.
I've got the TNW built gun, and must say they did one helluva job. Also, I don't think they did as many modifications as other companies that build the SA models.