Does the M+P have a safety? I have an SD9VE and it has a heavier trigger but no safety. I always thought the pull was designed a little heavier because there was no safety on the gun. But I have also heard that the older Sigmas had real heavy triggers. Personally I don't mind the weight of the trigger on mine as I do have several other DA only guns and they're all pretty heavy to begin with, so I guess I'm somewhat used to it.