Hi,
I never heared the term M&P level lock in this context, but over a year ago this Patent was granted to S&W:
http://www.google.com/patents?id=ZsqAAA ... q=manacles
it shows a new double locking mechanism in two variations which doesn't need a key to activate.
One question that arises is of course, is this new mechanism vulnerable in the Clejuso way. From the patent it's difficult to judge, in principle it might be as you can push the double lock slider against the locking bar. But this part looks identical to what we have in current M-100 cuffs and there you can't really hold down the ratchet with the double lock part (too little friction, corner too round, ...) so I expect it also won't be possible with this new lever.
Where did you see pictures of the new cuff? Does it look like the one in the patent?
Best wishes for 2009,
Martin