User blog comment:Leonardo Vergara Concha/How to craft a Ray Of Doom/@comment-5294711-20121011105347

Actually... I think it goes like this:

Dartling Gun --> Focused Firing: Install a stabilizer

Focused Firing --> Faster Barrel Spin: Improve... duh... the barrel system.

Faster Barrel Spin --> Laser Cannon: Add a photon charging system

Laser --> Ray of Doom: Improve photon charging system and adds another stabilizer to compress it into one straight line

Lightsaber (and other weapons) isn't involved.