This is what i imagine an ARM pellet from the RPG Project Biomodus looks like.

ARM is the universal ammunition used by weapons in the setting. Generally it comes in a ceramic container full of nanofluid about the size of a shotgun shell.

You can get the game here: https://www.drivethrurpg.com/product/307780/Project-Biomodus-Get-Rekt-Edition--StayAtHome Gotta love games with free versions :)