Anyway, this is a rotary magazine. Similar to a drum magazine, it's just a magazine in cylindrical form factor rather than a linear form factor. I'm not sure if anyone was able to successfully make one before. This version in particular stores 12 usable blue rods and one extra one that can't be fired. It has a ball joint connector to act as a paddle to help ensure the rods continue feeding without skipping teeth. I don't have many dark grey connectors but otherwise I'd scale this up using red rods and then store yellow rods. It'd be more useful as it'd fit more nicely with a connector body. Currently to maximize ammo use, I'm trying to fire directly from the magazine without feeding it further vertically. The problem is it's obviously an awkward fit. If you imagine a typical 5 layer gun, it'd fit in between layers 1-2 and 4-5 about halfway each. It's entirely doable, but just doesn't look too pretty.
It's nice in that it allows you to store a fair amount of ammo in a relatively compact amount of space, but it's otherwise not a practical storage solution as is. Aside from just trying to figure out how to attach it to a gun, figuring out how to reload it conveniently would be difficult. It -might- be more useful if it can be turned into a roofed, removable magazine. Then at least you can preload them first.
I hope someone can give a weapon that uses this a shot. Perhaps a bolt action for better performance. And again, I'd scale it up to store yellow rods so it's a little easier to use in a standard connector body.
Here's a quick video demonstration and a look inside it at the end: