There are days I'm still killing myself for not buying the 10/22 Gatling gun kit 20 years ago. Stupid, but at least relatively cheap to feed. LOL. I think the kit was $250. Plus $250-300 for 2 10/22's. And then $250 for a pile of hicap mags because using 10rd mags would be just stupid.
It's probably technically some sort of bump-stock-e-ma-bob in mASS now so there's that, too.