Core Eject Shotgun
[ULTRAKILL Collab] A shotgun powered by heat, capable of firing endlessly. When equipped, throwing a Pal Sphere is replaced with Core Eject. Hold to charge and extend its range. Cores hit by shots from Marksman Revolver will explode.
How to obtain
Core Eject Shotgun 
Pal Metal Ingot ×140
Plasteel ×113
Carbon Fiber ×56
Flame Organ ×70
Ancient Civilization Parts ×7