Oh, yeah .. I don't know why I said that. My cuz has a Mini Mac 10 and a Mac 11. I saw one of those grease gun mags just yesterday! Should have known!
That's an interesting piece though. Honestly, that would be a fun plinker if nothing else. I wouldn't use it in home defense .. just because of that whole .. pesky .. excessive force deal
however if that wasn't a possibility, it would fit that role adequately as well.
Not to mention that little guy might rise in value over time .. in fact .. it likely will.