I think the 19 round capacity mags are for the 9mm. I believe the extended mags for the new compact XDM are the same as the the existing XDM full-size mags, so if the .40 mags only hold 16 on the full-size, then the new compact's extended mags will only hold 16. I could be wrong.rmr1923 wrote:i've been looking into the compact XDm and it comes with an 11-roung mag and a spare 19 round mag - which is more than the 16 rounds that my full-size holds. not sure if my full-size mags will work in the compact but that would be a nice added benefit if they do. i also would be willing to bet that both the compact and full-size XDm might fit in the same IWB holster, so that may influence my decision a little bit too.
Yes, I believe bolsters for XDM will fit all of the XDM including the new compact.
I'm familiar and comfortable with the XDM, so for me it only ,makes sense to go to the new XDM compact if/when I change to something smaller unless I decided to go to something completely different like a single stack.