low effort thing i wanted to do just to get the idea out of my head... the symmetry is totally bleck

It's Panzer's mechanical backpack invention (the "Deus Ex Machina") and it's mechanical toony hands - hands that pull random weapons/objects out of the artificial hammerspace on his back.

fun fact: Panzer has crude mecha-arms under his thick grey gloves. He lost his hands in a lab accident he refuses to talk about. The extra hands in his DEM Is a way of overcompensating. :)