What developments have recently been made to the M&P?

[mkmckinley]

I remember reading somewhere a couple months ago that changes were being made to the M&P. What were they?

[rjacobs]

MA compliant spring in all models produced after Sept 2010 is the only thing that has been confirmed. Supposedly a slightly better trigger, but I dont think it has been confirmed whether that is due to a new trigger or simply because of the MA spring being put in.