Originally Posted by retired2006

Yes there is, if you comfortable with the disassembly of the sear block. There are notchs on the safety lever inside the pistol that can be deepened using a small round file, which will allow the safety detent block to engage more positively.
In order to do the modification, the sear block / safety assy must be removed from the pistol.
If you are not comfortable removing the sear block assy yourself, then any competent gunsmith could do the mod.
I have multiple M&P with safeties, and I have mod'd all of them to get a more positive feel.