They are called high capacity assault clips if I am not mistaken.
Oh, I know about those already. They've been around for years. It's the new fangled "multiple clip magazines" that I'm just now hearing about. I gotta get me one of them for my Ruger 77 so I can 'spray bullets' all over the place just like a bad-ass.
Do they make these for revolvers as well? That would be bitchin'!