You're talking about the original MAC guns, which were indeed reliable, if not controlable without the supressor. I'm talking about the current production junkers available now. Sorry about the confusion.
Concur. And except for the pilots and drivers who used 'em, most serious users did indeed go for the Sionics can up front rather than that danglestrap that tried to serve as a front grip, but was often seen with a neat little round hole or two burned through it.
Some of the current *M11/9* guns can be reworked to run okay with a little attention and modification to use the steel magazine of the Madsen M50 or the Swedish K. Even adaptations that use old Sten gun magazines are seen, and usually run reasonably reliably on the target range.