Truth be told you can skip the weapon crafting perks completely and just strip down vendor bought weapons/found weapons if you are patient.
But yes, only the science! perk is required for laser/plasma weapons.
I think the laser musket requires gun nut for the sights section.
They seem to require 1-2 gun nut for some scopes as well as science. Videos from a mrsmartdonkey on youtube confirm that gun nut IS indeed required for some of the scopes.
But still, the laser musket, as far as I am concerned, is not a "true" laser weapon since it is not powered by putting a battery into a slot in a box.
Pretty much. I had to rewatch that laser musket video mrsmartdonkey on youtube did to be sure. Also, it is 1-2 gun nut, not 1-3. Point still stands. Gun nut is needed for a laser weapon (if you consider laser musket a laser weapon), but only for the scopes on that weapon.
Gatling needs 4 science and 2 gun nut and it is a hell of a weapon.