I bought the M&P 9mm and the M&P 22 for a couple of reasons. Both are virtually identical in size, the 9 is a bit heavier, both fit my Blade-Tech holster. No reliability issues with either, the M&P22 eats just about any ammo but has zero issues with CCI Blazer or Mini-Mags. The M&P22 is a breeze to field strip.
I know a guy who has a Sig 226 with the .22 conversion kit, it has issues with cheap ammo and has had lots of FTF problems. The other thing I don't like is, it fails to lock the slide back on last round, so essentially, he dry fires it all the time.
I know a guy who has a Sig 226 with the .22 conversion kit, it has issues with cheap ammo and has had lots of FTF problems. The other thing I don't like is, it fails to lock the slide back on last round, so essentially, he dry fires it all the time.


















































