Successfully complete the indicated task to unlock the corresponding part:
07-Moonlight (laser blade), ASB-0710 (additional boosters shoulder piece): 
Defeat Orca Rank 5 Next Shinkai. 
All purchasable parts: Successfully complete both the Collared and ORCA story 
mode. 
EC-0307AB (triple back laser cannons): Successfully complete the "Attack on 
Carpals" mission in Chapter 3. 
Salineos (split missiles) and 051ANNR (assault rifle): Successfully complete 
the "Defeat White Glint" mission at the end of Chapter 2. 
White Glint Head, Core, Arms, Legs, and Head (top) Stabilizer: Successfully 
complete the "Defend Line Ark" mission at the end of Chapter 2 (White Glint 
does not have to survive).