Interesting device for sure. I don't see the need to store the tag line in the gun, I'd rather keep it separate, I like my own line management system better, that looks slow spinning the small handle to take up the line at the bottom.
One problem with it is that it's quite a bit larger then the other current tools for throwing fishing line like a hand slingshot or crossbow.
I think Elliot has nailed it, looks like a toy
-moss
