The standard one is perfectly adequate, but I'm feeling the itch to start modifying this. I know Magpul makes a set. Which one is it and what do you think of it?
The M&P Sport II is a carbine length system so, the Magpul carbine length furniture will work fine. Here is my M&P 15OR with a set of carbine length furniture.
Personally, I like the Matrix Diversified Industries Magpul six piece furniture sets, for the price and pattern choices. I have three different styles of buttstocks and two different type hand guards. The longer hand guards require the removal of the front sling swivel.