Board Thread:General Nerf discussion/@comment-27306930-20200306034220/@comment-30049823-20200306070650

If they're compatible with "Atomic Power Poppers", then the balls are MUCH smaller than those used in traditional Nerf & Larami ball blasters.

From eyeballing the "visual scale" of the grips, I'm gonna say the ones you found are the smaller ones, probably the same as these =>

(I have that exact set from a craigslist lot. And yeah, yeah, I've got a caliper available now, I'll measure them eventually! 😝 )