Appears to be fairly compatible with the blasters I've tried, especially the Diatron. A round may have slipped out of the Pyragon once, but worked for the other two tests.

Hurts a bit more that regular discs, and could easily take an eye out.

Especially if you remixed the design to include spinning razor blades or something.

• Added a version with a minimum of 2mm space up top, since I noticed that printed hollow @ .40mm was causing the tops to break off.

Disclaimer: This product should not be used, for anything, ever.

Printed on a 3D UP! printer, out of Affinia clear ABS (higher chance of fragmenting upon reaching target), upside down, with a raft, loose infill. 0.25mm layer thickness.

5.9g, 14 minutes. (9 minutes @ .40mm hollow, no raft)

Probably cheaper and faster to buy it commercially, but it's not nearly as painful for your victims.