Here is a Spring Thunder Shell for Nerf Hyper Balls. Hyper Balls are kind of a difficult ammunition to use however this shell consistently shoots up to 3 hyper balls. All credits to Radioactive52 for inspiring the pattern on the top of the shell. This shell is especially effective in close-range because when fired the hyper balls will bounce on ceilings and walls with a ridiculous trajectory. In my experience this shell works great as long as the balls are fully pushed to the back of the shell. Have fun!