Note: The Remix of this model seems to be a little smoother. You might try it first. I will rework this model to try to fix the issues with BBs falling out, or being too tight in the slot and not moving easily. Thanks for the feedback!
This is a new type of fidget toy that consists of a single piece with a spiraling channel that holds .177 (4.5 mm) BBs (I have a LOT of them).
Simply print vertically, with no supports, then pop as many BBs as you want into the channel. 12 BBs fills it approximately halfway, making room for lots of back and forth fidget goodness.
Enjoy!
The author marked this model as their own original creation.