UPDATE: The 357 Sig barrel is SPF, but the 9mm conversion barrel is still available.

As far as I know, no one is currently making conversion barrels for the M&P 2.0 Compact 4".
So, I have a 2.0 Compact in .40 S&W and found an S&W factory 4.25" - 357 Sig barrel and had my gun smith turn it down and install an 11 degree crown on it. It dropped right in and fired and functioned perfectly.
I also purchased a Storm Lake 9mm stainless steel conversion barrel and did the same thing; had it trimmed down and an 11 degree crown installed. Likewise it dropped right in and fired and function perfectly.
No more than a couple hundred rounds fired through either barrel.

SPF 357 Sig Conversion Barrel; $175 shipped
40 to 9mm Conversion Barrel; $200 shipped.

Sorry, I do not do Pay Pal and would prefer a postal MO. I will accept a personal check, but I will not ship until it has fully cleared.

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I will take the .357sig barrel.

Offered for sale are 4 S&W factory magazines, 12 round. Two are excellent condition and two I believe are brand new..... I installed brand new springs in all of them. I also have replacement springs and floor plates for them if interested. POR
The magazines are $35 each shipped USPS First Class.
Sorry I do ot do Pay Pal. I will require a postal MO for immediate shipping or a personal check, but will not ship until it fully clears.
Please PM if interested.....

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UPDATED 1-21-21
The 357 Sig barrel is SPF.