Craft it
You need
Make it at (any of these)
Production Assembly LineProduction Assembly Line IIAdvanced WorkshopWeapon Assembly LineWeapon Assembly Line IIAdvanced Weapon Assembly LineAncient Workbench
Needs a Pal with Handiwork. Best:Solenne (Lv 8), Selyne (Lv 7), Wistella (Lv 6)
Work: 100,000 · Unlock in the Technology menu at level 34 for 3 Technology points