NOTES FROM LUKE: The Worker Rival 15-Round Magazine is compatible with most rival mag fed blasters like the OOD Jupiter. While it may be rated 15, in my testing 16 also seems to fit just fine. The build quality is fantastic.
FEATURES: -Compatible with Rival Mag Fed Blasters (excluding the Zeus). -Works with the Apollo, OOD Jupiter We have been told the fit is tight on the Hera, due to the thicker bottom. -Compatible with Rival Rounds