Here is one of the methods to reach level 400 in Manufacturing of weapons, this one is not the only one of course but this guide should give you a line to follow.
The components you will need
All of the listed metals are salvageable through the Salvage Crew Skill, Crafting Components are sold by Crew Skill Merchants or salvageable through Salvage Missions. The list may get shorter if you reverse engineer all of your crafted crafts, but it is best to start with the stock listed below.
- Rank Metals In 1:
- Desh x20
- Silica x20
- Laminate x40
- Aluminum x40
- Rank 2 metals :
- Plastoïde x40
- Bronzium x40
- Plastacier x60
- Chanlon x60
- Rank 3 metals :
- hydrophobic x40
- Laqueux x40
- Rank 4 metals :
- Fiber mesh x60
- Bondite x60
- Resinite x40
- Dial X40
- Rank 5 metals :
- Electrum x60
- Polyplast x60
- Neutronium x20
- Carbonite Amorphe x20
- Manufacturing components :
- Conductor flow x100 (10 credits per unit)
- Insulating flux x80 (50 credits per unit)
- Soldering flux x80 (200 credits per unit)
- Thermoplast Flux x80 (400 credits per unit)
The way
Sources
Swtor-Spy
Knotor
Swtor-holo