So my lovely wife has decided my 4.25 MP9 is now hers. Okay fine I'll buy myself another, but here is where it gets tricky. I have a spare threaded barrel for the 4.25 9mm. So if I get a 4.25 M&P 40 I can drop that in, get more 9 mags and use it as I see fit. Or buy the 9 Pro which I am sure will lead to buying a 40 Pro. Have not done any comp yet but we may start. What do you shooters think?