M&P m2.0 metal firearm

[MBH60]

Does the metal M&P m2.0 come with a stainless steel glide rod or is it polymer? If it is polymer can I replace it with a stainless steel glide rod?

[jbtrucker]

M&P pistols have metal recoil spring assembly

[OKFC05]

The ISMI metal spring assembly with steel guide rod and flat wound spring that S&W uses in the M&Ps is superior to any after market substitute--except those that are also using ISMI. Even if you shoot 20,000 rounds in a year, you can just change the ISMI for a new one at the end of the year.
In my experience, get some spare trigger springs, and be sure the fiber damper is undamaged by cleaner. Also spare strikers, and carefully inspect at every cleaning for chipping. DO NOT oil the striker assembly, the nylon sleeve is the "lube."
Have fun with your M&P. I have.