I'd like to know how well that worked in combat. I was a gunner for a long spell when I was young enough to carry all that crap and it would be unworldly heavy and clumsy. Damage to the feed chute would cause a prolonged stoppage for sure, and always at the worst time... For just makin' empty brass though, great times.
But for the little pistol, what's more fun than a .22 and an endless magazine...?