17?

The 2.0 Compact normally carries 15 rounds.

But it accepts the 17 rounders from the full-size M&P 9.  It even comes with spacers to slip over the magazines to prevent damage to the ejector from over-insertion.

 

The conundrum for this winter carry season is whether I should apply those sleeves and run with 17 rounds instead of the native 15.

I carried the M&P 45C with the native 8 rounder in the gun and two spare 10-rounders.

It makes the 9C very similar to the Glock 45, except slightly smaller.

I still have a week or two before the weather allows to think about it.