My observations tell me that the M&P is indeed fully cocked when the slide closes and is single action.
The Glock firing pin is partially cocked when the slide closes and is only fully cocked when the trigger is pulled.....double action.....as designated by the BATFE. The beauty of the Glock safe action is that it is up to the user to decide how he wants to use it.
U.S. Army-MNNG 73-83 95 Bravo
NRA Life Member