I also recieved my M&P today. While the gun looks incredibly well done (for WE that is), it doesn't work.
I'm not talking about the faulty hop-up chamber, which I was able to fix. Problem is, that it won't cycle properly.
If you don't push the slide down while cycling, the hammer will not strain and the nozzle loading gets stuck halfway.
The first shot is fine, but the next one causes the magazine to dispense all its gas and sometimes the fullauto issue kicks
in (3-4 shots til all the gas went out).
Fruitcage!