Quote Originally Posted by FortTom View Post
UW, are the ver. 2.0 mags backwards compatible the 1.0 pistols, or a wholly different mag?
FT
Fullsize M&P9 1.0 and 2.0's can interchange mags.

Compact 2.0's are different design than 1.0's

https://www.smith-wesson.com/firearm...-m20-4-compact

vs

https://www.smith-wesson.com/firearms/mp-9c-compact

The 2.0 also has a 3.6" barrel configuration that just came out to better compete with the Glock 19