Nope.
The "double cam" is probably the two projections that radiate from the barrel. One is wedged into a recess in the slide, the other is cammed into a groove in the locking area of the frame. As the slide and barrel recoil, the "central block tooth" angles against the lower barrel projection and rotates the barrel. Once the barrel has rotated far enough the other projection clears its slide recess and the slide can continue on it's own.
This system is simpler than the wedge system but retains the same straight line feeding. It is essentially a similar principle to the Browning system, but uses rotation rather than tilt. It doesn't seem to be as accurate as either, at least in the Berettas, and requires good lubrication (the M2 does, anyway).
This is similar looking, but completely different than the MAB rotating barrel.