Out this month was the KO of MP-47 Hound (from about post #280), with the minor differences noted over the next three or so pages.
So, keep an eye out, or be aware of really cheap ones on ebay now (like KO MP-46 Blackwidow, now as cheap as US$40 on ebay).
Since the original was so fragile on the sides, people are actually excited about this one, hoping it uses a stronger plastic... but it probably didn't, as the design of the joint was flawed.

That's less than a year... and Blackwidow was only about 6 months. If you don't get to pre-order them, it doesn't give us much time to secure legit MP toys, before the fakes infiltrate the market.